1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "jfr/support/jfrThreadId.hpp"
43 #include "logging/log.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/arrayOop.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceOop.hpp"
53 #include "oops/markWord.hpp"
54 #include "oops/method.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "oops/typeArrayKlass.hpp"
60 #include "oops/typeArrayOop.inline.hpp"
61 #include "oops/valueArrayOop.inline.hpp"
62 #include "oops/valueKlass.inline.hpp"
63 #include "prims/jniCheck.hpp"
64 #include "prims/jniExport.hpp"
65 #include "prims/jniFastGetField.hpp"
66 #include "prims/jvm_misc.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/jvmtiThreadState.hpp"
69 #include "runtime/atomic.hpp"
70 #include "runtime/fieldDescriptor.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/interfaceSupport.inline.hpp"
73 #include "runtime/java.hpp"
74 #include "runtime/javaCalls.hpp"
75 #include "runtime/jfieldIDWorkaround.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/orderAccess.hpp"
78 #include "runtime/reflection.hpp"
79 #include "runtime/safepointVerifiers.hpp"
80 #include "runtime/sharedRuntime.hpp"
81 #include "runtime/signature.hpp"
82 #include "runtime/thread.inline.hpp"
83 #include "runtime/vmOperations.hpp"
84 #include "services/memTracker.hpp"
85 #include "services/runtimeService.hpp"
86 #include "utilities/defaultStream.hpp"
87 #include "utilities/dtrace.hpp"
88 #include "utilities/events.hpp"
89 #include "utilities/histogram.hpp"
90 #include "utilities/macros.hpp"
91 #include "utilities/vmError.hpp"
92 #if INCLUDE_JVMCI
93 #include "jvmci/jvmciCompiler.hpp"
94 #endif
95
96 static jint CurrentVersion = JNI_VERSION_10;
97
98 #ifdef _WIN32
99 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
100 #endif
101
102 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
103 // '-return' probe regardless of the return path is taken out of the function.
104 // Methods that have multiple return paths use this to avoid having to
105 // instrument each return path. Methods that use CHECK or THROW must use this
106 // since those macros can cause an immedate uninstrumented return.
107 //
108 // In order to get the return value, a reference to the variable containing
109 // the return value must be passed to the contructor of the object, and
110 // the return value must be set before return (since the mark object has
111 // a reference to it).
112 //
113 // Example:
114 // DT_RETURN_MARK_DECL(SomeFunc, int);
115 // JNI_ENTRY(int, SomeFunc, ...)
116 // int return_value = 0;
117 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
118 // foo(CHECK_0)
119 // return_value = 5;
120 // return return_value;
121 // JNI_END
122 #define DT_RETURN_MARK_DECL(name, type, probe) \
123 DTRACE_ONLY( \
124 class DTraceReturnProbeMark_##name { \
125 public: \
126 const type& _ret_ref; \
127 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
128 ~DTraceReturnProbeMark_##name() { \
129 probe; \
130 } \
131 } \
132 )
133 // Void functions are simpler since there's no return value
134 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
135 DTRACE_ONLY( \
136 class DTraceReturnProbeMark_##name { \
137 public: \
138 ~DTraceReturnProbeMark_##name() { \
139 probe; \
140 } \
141 } \
142 )
143
144 // Place these macros in the function to mark the return. Non-void
145 // functions need the type and address of the return value.
146 #define DT_RETURN_MARK(name, type, ref) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
148 #define DT_VOID_RETURN_MARK(name) \
149 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
150
151
152 // Use these to select distinct code for floating-point vs. non-floating point
153 // situations. Used from within common macros where we need slightly
154 // different behavior for Float/Double
155 #define FP_SELECT_Boolean(intcode, fpcode) intcode
156 #define FP_SELECT_Byte(intcode, fpcode) intcode
157 #define FP_SELECT_Char(intcode, fpcode) intcode
158 #define FP_SELECT_Short(intcode, fpcode) intcode
159 #define FP_SELECT_Object(intcode, fpcode) intcode
160 #define FP_SELECT_Int(intcode, fpcode) intcode
161 #define FP_SELECT_Long(intcode, fpcode) intcode
162 #define FP_SELECT_Float(intcode, fpcode) fpcode
163 #define FP_SELECT_Double(intcode, fpcode) fpcode
164 #define FP_SELECT(TypeName, intcode, fpcode) \
165 FP_SELECT_##TypeName(intcode, fpcode)
166
167 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
168 // (dtrace doesn't do FP yet)
169 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
172 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
173 FP_SELECT(TypeName, \
174 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
175
176
177 // out-of-line helpers for class jfieldIDWorkaround:
178
179 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
180 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
181 uintptr_t as_uint = (uintptr_t) id;
182 intptr_t offset = raw_instance_offset(id);
183 if (is_checked_jfieldID(id)) {
184 if (!klass_hash_ok(k, id)) {
185 return false;
186 }
187 }
188 return InstanceKlass::cast(k)->contains_field_offset(offset);
189 } else {
190 JNIid* result = (JNIid*) id;
191 #ifdef ASSERT
192 return result != NULL && result->is_static_field_id();
193 #else
194 return result != NULL;
195 #endif
196 }
197 }
198
199
200 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
201 if (offset <= small_offset_mask) {
202 Klass* field_klass = k;
203 Klass* super_klass = field_klass->super();
204 // With compressed oops the most super class with nonstatic fields would
205 // be the owner of fields embedded in the header.
206 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
207 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
208 field_klass = super_klass; // super contains the field also
209 super_klass = field_klass->super();
210 }
211 debug_only(NoSafepointVerifier nosafepoint;)
212 uintptr_t klass_hash = field_klass->identity_hash();
213 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
214 } else {
215 #if 0
216 #ifndef PRODUCT
217 {
218 ResourceMark rm;
219 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
220 }
221 #endif
222 #endif
223 return 0;
224 }
225 }
226
227 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
228 uintptr_t as_uint = (uintptr_t) id;
229 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
230 do {
231 debug_only(NoSafepointVerifier nosafepoint;)
232 // Could use a non-blocking query for identity_hash here...
233 if ((k->identity_hash() & klass_mask) == klass_hash)
234 return true;
235 k = k->super();
236 } while (k != NULL);
237 return false;
238 }
239
240 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
241 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
242 uintptr_t as_uint = (uintptr_t) id;
243 intptr_t offset = raw_instance_offset(id);
244 if (VerifyJNIFields) {
245 if (is_checked_jfieldID(id)) {
246 guarantee(klass_hash_ok(k, id),
247 "Bug in native code: jfieldID class must match object");
248 } else {
249 #if 0
250 #ifndef PRODUCT
251 if (Verbose) {
252 ResourceMark rm;
253 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
254 }
255 #endif
256 #endif
257 }
258 }
259 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
260 "Bug in native code: jfieldID offset must address interior of object");
261 }
262
263 // Wrapper to trace JNI functions
264
265 #ifdef ASSERT
266 Histogram* JNIHistogram;
267 static volatile int JNIHistogram_lock = 0;
268
269 class JNIHistogramElement : public HistogramElement {
270 public:
271 JNIHistogramElement(const char* name);
272 };
273
274 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
275 _name = elementName;
276 uintx count = 0;
277
278 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
279 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
280 count +=1;
281 if ( (WarnOnStalledSpinLock > 0)
282 && (count % WarnOnStalledSpinLock == 0)) {
283 warning("JNIHistogram_lock seems to be stalled");
284 }
285 }
286 }
287
288
289 if(JNIHistogram == NULL)
290 JNIHistogram = new Histogram("JNI Call Counts",100);
291
292 JNIHistogram->add_element(this);
293 Atomic::dec(&JNIHistogram_lock);
294 }
295
296 #define JNICountWrapper(arg) \
297 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
298 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
299 if (e != NULL) e->increment_count()
300 #define JNIWrapper(arg) JNICountWrapper(arg);
301 #else
302 #define JNIWrapper(arg)
303 #endif
304
305
306 // Implementation of JNI entries
307
308 DT_RETURN_MARK_DECL(DefineClass, jclass
309 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
310
311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
312 const jbyte *buf, jsize bufLen))
313 JNIWrapper("DefineClass");
314
315 HOTSPOT_JNI_DEFINECLASS_ENTRY(
316 env, (char*) name, loaderRef, (char*) buf, bufLen);
317
318 jclass cls = NULL;
319 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
320
321 TempNewSymbol class_name = NULL;
322 // Since exceptions can be thrown, class initialization can take place
323 // if name is NULL no check for class name in .class stream has to be made.
324 if (name != NULL) {
325 const int str_len = (int)strlen(name);
326 if (str_len > Symbol::max_length()) {
327 // It's impossible to create this class; the name cannot fit
328 // into the constant pool.
329 Exceptions::fthrow(THREAD_AND_LOCATION,
330 vmSymbols::java_lang_NoClassDefFoundError(),
331 "Class name exceeds maximum length of %d: %s",
332 Symbol::max_length(),
333 name);
334 return 0;
335 }
336 class_name = SymbolTable::new_symbol(name);
337 }
338 ResourceMark rm(THREAD);
339 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
340 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
341
342 if (UsePerfData && !class_loader.is_null()) {
343 // check whether the current caller thread holds the lock or not.
344 // If not, increment the corresponding counter
345 if (ObjectSynchronizer::
346 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
347 ObjectSynchronizer::owner_self) {
348 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
349 }
350 }
351 Klass* k = SystemDictionary::resolve_from_stream(class_name,
352 class_loader,
353 Handle(),
354 &st,
355 CHECK_NULL);
356
357 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
358 trace_class_resolution(k);
359 }
360
361 cls = (jclass)JNIHandles::make_local(
362 env, k->java_mirror());
363 return cls;
364 JNI_END
365
366
367
368 DT_RETURN_MARK_DECL(FindClass, jclass
369 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
370
371 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
372 JNIWrapper("FindClass");
373
374 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
375
376 jclass result = NULL;
377 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
378
379 // Sanity check the name: it cannot be null or larger than the maximum size
380 // name we can fit in the constant pool.
381 if (name == NULL) {
382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
383 }
384 if ((int)strlen(name) > Symbol::max_length()) {
385 Exceptions::fthrow(THREAD_AND_LOCATION,
386 vmSymbols::java_lang_NoClassDefFoundError(),
387 "Class name exceeds maximum length of %d: %s",
388 Symbol::max_length(),
389 name);
390 return 0;
391 }
392
393 //%note jni_3
394 Handle protection_domain;
395 // Find calling class
396 Klass* k = thread->security_get_caller_class(0);
397 // default to the system loader when no context
398 Handle loader(THREAD, SystemDictionary::java_system_loader());
399 if (k != NULL) {
400 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
401 // in the correct class context.
402 if (k->class_loader() == NULL &&
403 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
404 JavaValue result(T_OBJECT);
405 JavaCalls::call_static(&result, k,
406 vmSymbols::getFromClass_name(),
407 vmSymbols::void_class_signature(),
408 CHECK_NULL);
409 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
410 // a non-NULL Class object. When invoked from JNI_OnUnload,
411 // it will return NULL to indicate no context.
412 oop mirror = (oop) result.get_jobject();
413 if (mirror != NULL) {
414 Klass* fromClass = java_lang_Class::as_Klass(mirror);
415 loader = Handle(THREAD, fromClass->class_loader());
416 protection_domain = Handle(THREAD, fromClass->protection_domain());
417 }
418 } else {
419 loader = Handle(THREAD, k->class_loader());
420 }
421 }
422
423 TempNewSymbol sym = SymbolTable::new_symbol(name);
424 result = find_class_from_class_loader(env, sym, true, loader,
425 protection_domain, true, thread);
426
427 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
428 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
429 }
430
431 return result;
432 JNI_END
433
434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
436
437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
438 JNIWrapper("FromReflectedMethod");
439
440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
441
442 jmethodID ret = NULL;
443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
444
445 // method is a handle to a java.lang.reflect.Method object
446 oop reflected = JNIHandles::resolve_non_null(method);
447 oop mirror = NULL;
448 int slot = 0;
449
450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
451 mirror = java_lang_reflect_Constructor::clazz(reflected);
452 slot = java_lang_reflect_Constructor::slot(reflected);
453 } else {
454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
455 mirror = java_lang_reflect_Method::clazz(reflected);
456 slot = java_lang_reflect_Method::slot(reflected);
457 }
458 Klass* k1 = java_lang_Class::as_Klass(mirror);
459
460 // Make sure class is initialized before handing id's out to methods
461 k1->initialize(CHECK_NULL);
462 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
463 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
464 return ret;
465 JNI_END
466
467 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
468 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
469
470 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
471 JNIWrapper("FromReflectedField");
472
473 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
474
475 jfieldID ret = NULL;
476 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
477
478 // field is a handle to a java.lang.reflect.Field object
479 oop reflected = JNIHandles::resolve_non_null(field);
480 oop mirror = java_lang_reflect_Field::clazz(reflected);
481 Klass* k1 = java_lang_Class::as_Klass(mirror);
482 int slot = java_lang_reflect_Field::slot(reflected);
483 int modifiers = java_lang_reflect_Field::modifiers(reflected);
484
485 // Make sure class is initialized before handing id's out to fields
486 k1->initialize(CHECK_NULL);
487
488 // First check if this is a static field
489 if (modifiers & JVM_ACC_STATIC) {
490 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
491 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
492 assert(id != NULL, "corrupt Field object");
493 debug_only(id->set_is_static_field_id();)
494 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
495 ret = jfieldIDWorkaround::to_static_jfieldID(id);
496 return ret;
497 }
498
499 // The slot is the index of the field description in the field-array
500 // The jfieldID is the offset of the field within the object
501 // It may also have hash bits for k, if VerifyJNIFields is turned on.
502 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
503 bool is_flattened = InstanceKlass::cast(k1)->field_is_flattened(slot);
504 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
505 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flattened);
506 return ret;
507 JNI_END
508
509
510 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
511 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
512
513 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
514 JNIWrapper("ToReflectedMethod");
515
516 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
517
518 jobject ret = NULL;
519 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
520
521 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
522 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
523 oop reflection_method;
524 if (m->is_object_constructor()) {
525 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
526 } else {
527 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
528 }
529 ret = JNIHandles::make_local(env, reflection_method);
530 return ret;
531 JNI_END
532
533 DT_RETURN_MARK_DECL(GetSuperclass, jclass
534 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
535
536 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
537 JNIWrapper("GetSuperclass");
538
539 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
540
541 jclass obj = NULL;
542 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
543
544 oop mirror = JNIHandles::resolve_non_null(sub);
545 // primitive classes return NULL
546 if (java_lang_Class::is_primitive(mirror)) return NULL;
547
548 // Rules of Class.getSuperClass as implemented by KLass::java_super:
549 // arrays return Object
550 // interfaces return NULL
551 // proper classes return Klass::super()
552 Klass* k = java_lang_Class::as_Klass(mirror);
553 if (k->is_interface()) return NULL;
554
555 // return mirror for superclass
556 Klass* super = k->java_super();
557 // super2 is the value computed by the compiler's getSuperClass intrinsic:
558 debug_only(Klass* super2 = ( k->is_array_klass()
559 ? SystemDictionary::Object_klass()
560 : k->super() ) );
561 assert(super == super2,
562 "java_super computation depends on interface, array, other super");
563 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
564 return obj;
565 JNI_END
566
567 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
568 JNIWrapper("IsSubclassOf");
569
570 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
571
572 oop sub_mirror = JNIHandles::resolve_non_null(sub);
573 oop super_mirror = JNIHandles::resolve_non_null(super);
574 if (java_lang_Class::is_primitive(sub_mirror) ||
575 java_lang_Class::is_primitive(super_mirror)) {
576 jboolean ret = (sub_mirror == super_mirror);
577
578 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
579 return ret;
580 }
581 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
582 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
583 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
584 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
585 JNI_TRUE : JNI_FALSE;
586 if (sub_klass == super_klass && sub_klass->is_value()) {
587 // for inline class, V <: V?
588 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(sub_klass));
589 if (sub_mirror == super_mirror || (sub_mirror == vk->value_mirror() && super_mirror == vk->indirect_mirror())) {
590 ret = JNI_TRUE;
591 } else {
592 ret = JNI_FALSE;
593 }
594 }
595 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
596 return ret;
597 JNI_END
598
599
600 DT_RETURN_MARK_DECL(Throw, jint
601 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
602
603 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
604 JNIWrapper("Throw");
605
606 HOTSPOT_JNI_THROW_ENTRY(env, obj);
607
608 jint ret = JNI_OK;
609 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
610
611 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
612 ShouldNotReachHere();
613 return 0; // Mute compiler.
614 JNI_END
615
616
617 DT_RETURN_MARK_DECL(ThrowNew, jint
618 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
619
620 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
621 JNIWrapper("ThrowNew");
622
623 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
624
625 jint ret = JNI_OK;
626 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
627
628 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
629 Symbol* name = k->name();
630 Handle class_loader (THREAD, k->class_loader());
631 Handle protection_domain (THREAD, k->protection_domain());
632 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
633 ShouldNotReachHere();
634 return 0; // Mute compiler.
635 JNI_END
636
637
638 // JNI functions only transform a pending async exception to a synchronous
639 // exception in ExceptionOccurred and ExceptionCheck calls, since
640 // delivering an async exception in other places won't change the native
641 // code's control flow and would be harmful when native code further calls
642 // JNI functions with a pending exception. Async exception is also checked
643 // during the call, so ExceptionOccurred/ExceptionCheck won't return
644 // false but deliver the async exception at the very end during
645 // state transition.
646
647 static void jni_check_async_exceptions(JavaThread *thread) {
648 assert(thread == Thread::current(), "must be itself");
649 thread->check_and_handle_async_exceptions();
650 }
651
652 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
653 JNIWrapper("ExceptionOccurred");
654
655 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
656
657 jni_check_async_exceptions(thread);
658 oop exception = thread->pending_exception();
659 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
660
661 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
662 return ret;
663 JNI_END
664
665
666 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
667 JNIWrapper("ExceptionDescribe");
668
669 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
670
671 if (thread->has_pending_exception()) {
672 Handle ex(thread, thread->pending_exception());
673 thread->clear_pending_exception();
674 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
675 // Don't print anything if we are being killed.
676 } else {
677 jio_fprintf(defaultStream::error_stream(), "Exception ");
678 if (thread != NULL && thread->threadObj() != NULL) {
679 ResourceMark rm(THREAD);
680 jio_fprintf(defaultStream::error_stream(),
681 "in thread \"%s\" ", thread->get_thread_name());
682 }
683 if (ex->is_a(SystemDictionary::Throwable_klass())) {
684 JavaValue result(T_VOID);
685 JavaCalls::call_virtual(&result,
686 ex,
687 SystemDictionary::Throwable_klass(),
688 vmSymbols::printStackTrace_name(),
689 vmSymbols::void_method_signature(),
690 THREAD);
691 // If an exception is thrown in the call it gets thrown away. Not much
692 // we can do with it. The native code that calls this, does not check
693 // for the exception - hence, it might still be in the thread when DestroyVM gets
694 // called, potentially causing a few asserts to trigger - since no pending exception
695 // is expected.
696 CLEAR_PENDING_EXCEPTION;
697 } else {
698 ResourceMark rm(THREAD);
699 jio_fprintf(defaultStream::error_stream(),
700 ". Uncaught exception of type %s.",
701 ex->klass()->external_name());
702 }
703 }
704 }
705
706 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
707 JNI_END
708
709
710 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
711 JNIWrapper("ExceptionClear");
712
713 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
714
715 // The jni code might be using this API to clear java thrown exception.
716 // So just mark jvmti thread exception state as exception caught.
717 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
718 if (state != NULL && state->is_exception_detected()) {
719 state->set_exception_caught();
720 }
721 thread->clear_pending_exception();
722
723 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
724 JNI_END
725
726
727 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
728 JNIWrapper("FatalError");
729
730 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
731
732 tty->print_cr("FATAL ERROR in native method: %s", msg);
733 thread->print_stack();
734 os::abort(); // Dump core and abort
735 JNI_END
736
737
738 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
739 JNIWrapper("PushLocalFrame");
740
741 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
742
743 //%note jni_11
744 if (capacity < 0 ||
745 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
747 return JNI_ERR;
748 }
749 JNIHandleBlock* old_handles = thread->active_handles();
750 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
751 assert(new_handles != NULL, "should not be NULL");
752 new_handles->set_pop_frame_link(old_handles);
753 thread->set_active_handles(new_handles);
754 jint ret = JNI_OK;
755 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
756 return ret;
757 JNI_END
758
759
760 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
761 JNIWrapper("PopLocalFrame");
762
763 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
764
765 //%note jni_11
766 Handle result_handle(thread, JNIHandles::resolve(result));
767 JNIHandleBlock* old_handles = thread->active_handles();
768 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
769 if (new_handles != NULL) {
770 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
771 // This way code will still work if PopLocalFrame is called without a corresponding
772 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
773 // the release_block call will release the blocks.
774 thread->set_active_handles(new_handles);
775 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
776 JNIHandleBlock::release_block(old_handles, thread); // may block
777 result = JNIHandles::make_local(thread, result_handle());
778 }
779 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
780 return result;
781 JNI_END
782
783
784 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
785 JNIWrapper("NewGlobalRef");
786
787 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
788
789 Handle ref_handle(thread, JNIHandles::resolve(ref));
790 jobject ret = JNIHandles::make_global(ref_handle);
791
792 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
793 return ret;
794 JNI_END
795
796 // Must be JNI_ENTRY (with HandleMark)
797 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
798 JNIWrapper("DeleteGlobalRef");
799
800 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
801
802 JNIHandles::destroy_global(ref);
803
804 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
805 JNI_END
806
807 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
808 JNIWrapper("DeleteLocalRef");
809
810 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
811
812 JNIHandles::destroy_local(obj);
813
814 HOTSPOT_JNI_DELETELOCALREF_RETURN();
815 JNI_END
816
817 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
818 JNIWrapper("IsSameObject");
819
820 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
821
822 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
823
824 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
825 return ret;
826 JNI_END
827
828
829 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
830 JNIWrapper("NewLocalRef");
831
832 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
833
834 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
835
836 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
837 return ret;
838 JNI_END
839
840 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
841 JNIWrapper("EnsureLocalCapacity");
842
843 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
844
845 jint ret;
846 if (capacity >= 0 &&
847 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
848 ret = JNI_OK;
849 } else {
850 ret = JNI_ERR;
851 }
852
853 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
854 return ret;
855 JNI_END
856
857 // Return the Handle Type
858 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
859 JNIWrapper("GetObjectRefType");
860
861 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
862
863 jobjectRefType ret = JNIInvalidRefType;
864 if (obj != NULL) {
865 ret = JNIHandles::handle_type(thread, obj);
866 }
867
868 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
869 return ret;
870 JNI_END
871
872
873 class JNI_ArgumentPusher : public SignatureIterator {
874 protected:
875 JavaCallArguments* _arguments;
876
877 virtual void get_bool () = 0;
878 virtual void get_char () = 0;
879 virtual void get_short () = 0;
880 virtual void get_byte () = 0;
881 virtual void get_int () = 0;
882 virtual void get_long () = 0;
883 virtual void get_float () = 0;
884 virtual void get_double () = 0;
885 virtual void get_object () = 0;
886 virtual void get_valuetype() = 0;
887
888 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
889 this->_return_type = T_ILLEGAL;
890 _arguments = NULL;
891 }
892
893 public:
894 virtual void iterate( uint64_t fingerprint ) = 0;
895
896 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
897
898 inline void do_bool() { if (!is_return_type()) get_bool(); }
899 inline void do_char() { if (!is_return_type()) get_char(); }
900 inline void do_short() { if (!is_return_type()) get_short(); }
901 inline void do_byte() { if (!is_return_type()) get_byte(); }
902 inline void do_int() { if (!is_return_type()) get_int(); }
903 inline void do_long() { if (!is_return_type()) get_long(); }
904 inline void do_float() { if (!is_return_type()) get_float(); }
905 inline void do_double() { if (!is_return_type()) get_double(); }
906 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
907 inline void do_valuetype(int begin, int end) { if (!is_return_type()) get_valuetype(); }
908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
909 inline void do_void() { }
910
911 JavaCallArguments* arguments() { return _arguments; }
912 void push_receiver(Handle h) { _arguments->push_oop(h); }
913 };
914
915
916 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
917 protected:
918 va_list _ap;
919
920 inline void get_bool() {
921 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
922 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
923 // TemplateInterpreterGenerator::generate_result_handler_for and
924 // SharedRuntime::generate_native_wrapper.
925 jboolean b = va_arg(_ap, jint);
926 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
927 }
928 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
929 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
930 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
931 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
932
933 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
934
935 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
936 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
937 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
938 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
939 inline void get_valuetype() { _arguments->push_jobject(va_arg(_ap, jobject)); }
940
941 inline void set_ap(va_list rap) {
942 va_copy(_ap, rap);
943 }
944
945 public:
946 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
947 : JNI_ArgumentPusher(signature) {
948 set_ap(rap);
949 }
950 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
951 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
952 set_ap(rap);
953 }
954
955 // Optimized path if we have the bitvector form of signature
956 void iterate( uint64_t fingerprint ) {
957 if (fingerprint == (uint64_t)CONST64(-1)) {
958 SignatureIterator::iterate(); // Must be too many arguments
959 } else {
960 _return_type = (BasicType)((fingerprint >> static_feature_size) &
961 result_feature_mask);
962
963 assert(fingerprint, "Fingerprint should not be 0");
964 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
965 while ( 1 ) {
966 switch ( fingerprint & parameter_feature_mask ) {
967 case bool_parm:
968 get_bool();
969 break;
970 case char_parm:
971 get_char();
972 break;
973 case short_parm:
974 get_short();
975 break;
976 case byte_parm:
977 get_byte();
978 break;
979 case int_parm:
980 get_int();
981 break;
982 case obj_parm:
983 get_object();
984 break;
985 case long_parm:
986 get_long();
987 break;
988 case float_parm:
989 get_float();
990 break;
991 case double_parm:
992 get_double();
993 break;
994 case done_parm:
995 return;
996 break;
997 default:
998 ShouldNotReachHere();
999 break;
1000 }
1001 fingerprint >>= parameter_feature_size;
1002 }
1003 }
1004 }
1005 };
1006
1007
1008 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1009 protected:
1010 const jvalue *_ap;
1011
1012 inline void get_bool() {
1013 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1014 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1015 // TemplateInterpreterGenerator::generate_result_handler_for and
1016 // SharedRuntime::generate_native_wrapper.
1017 jboolean b = (_ap++)->z;
1018 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1019 }
1020 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1021 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1022 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1023 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1024
1025 inline void get_long() { _arguments->push_long((_ap++)->j); }
1026 inline void get_float() { _arguments->push_float((_ap++)->f); }
1027 inline void get_double() { _arguments->push_double((_ap++)->d);}
1028 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1029 // value types are implemented with oops too
1030 inline void get_valuetype() { _arguments->push_jobject((_ap++)->l); }
1031
1032 inline void set_ap(const jvalue *rap) { _ap = rap; }
1033
1034 public:
1035 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1036 : JNI_ArgumentPusher(signature) {
1037 set_ap(rap);
1038 }
1039 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1040 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1041 set_ap(rap);
1042 }
1043
1044 // Optimized path if we have the bitvector form of signature
1045 void iterate( uint64_t fingerprint ) {
1046 if (fingerprint == (uint64_t)CONST64(-1)) {
1047 SignatureIterator::iterate(); // Must be too many arguments
1048 } else {
1049 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1050 result_feature_mask);
1051 assert(fingerprint, "Fingerprint should not be 0");
1052 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1053 while ( 1 ) {
1054 switch ( fingerprint & parameter_feature_mask ) {
1055 case bool_parm:
1056 get_bool();
1057 break;
1058 case char_parm:
1059 get_char();
1060 break;
1061 case short_parm:
1062 get_short();
1063 break;
1064 case byte_parm:
1065 get_byte();
1066 break;
1067 case int_parm:
1068 get_int();
1069 break;
1070 case obj_parm:
1071 get_object();
1072 break;
1073 case long_parm:
1074 get_long();
1075 break;
1076 case float_parm:
1077 get_float();
1078 break;
1079 case double_parm:
1080 get_double();
1081 break;
1082 case done_parm:
1083 return;
1084 break;
1085 default:
1086 ShouldNotReachHere();
1087 break;
1088 }
1089 fingerprint >>= parameter_feature_size;
1090 }
1091 }
1092 }
1093 };
1094
1095
1096 enum JNICallType {
1097 JNI_STATIC,
1098 JNI_VIRTUAL,
1099 JNI_NONVIRTUAL
1100 };
1101
1102
1103
1104 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1105 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1106
1107 // Create object to hold arguments for the JavaCall, and associate it with
1108 // the jni parser
1109 ResourceMark rm(THREAD);
1110 int number_of_parameters = method->size_of_parameters();
1111 JavaCallArguments java_args(number_of_parameters);
1112 args->set_java_argument_object(&java_args);
1113
1114 assert(method->is_static(), "method should be static");
1115
1116 // Fill out JavaCallArguments object
1117 args->iterate( Fingerprinter(method).fingerprint() );
1118 // Initialize result type
1119 result->set_type(args->get_ret_type());
1120
1121 // Invoke the method. Result is returned as oop.
1122 JavaCalls::call(result, method, &java_args, CHECK);
1123
1124 // Convert result
1125 if (is_reference_type(result->get_type())) {
1126 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1127 }
1128 }
1129
1130
1131 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1132 oop recv = JNIHandles::resolve(receiver);
1133 if (recv == NULL) {
1134 THROW(vmSymbols::java_lang_NullPointerException());
1135 }
1136 Handle h_recv(THREAD, recv);
1137
1138 int number_of_parameters;
1139 Method* selected_method;
1140 {
1141 Method* m = Method::resolve_jmethod_id(method_id);
1142 number_of_parameters = m->size_of_parameters();
1143 Klass* holder = m->method_holder();
1144 if (call_type != JNI_VIRTUAL) {
1145 selected_method = m;
1146 } else if (!m->has_itable_index()) {
1147 // non-interface call -- for that little speed boost, don't handlize
1148 debug_only(NoSafepointVerifier nosafepoint;)
1149 // jni_GetMethodID makes sure class is linked and initialized
1150 // so m should have a valid vtable index.
1151 assert(m->valid_vtable_index(), "no valid vtable index");
1152 int vtbl_index = m->vtable_index();
1153 if (vtbl_index != Method::nonvirtual_vtable_index) {
1154 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1155 } else {
1156 // final method
1157 selected_method = m;
1158 }
1159 } else {
1160 // interface call
1161 int itbl_index = m->itable_index();
1162 Klass* k = h_recv->klass();
1163 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1164 }
1165 }
1166
1167 methodHandle method(THREAD, selected_method);
1168
1169 // Create object to hold arguments for the JavaCall, and associate it with
1170 // the jni parser
1171 ResourceMark rm(THREAD);
1172 JavaCallArguments java_args(number_of_parameters);
1173 args->set_java_argument_object(&java_args);
1174
1175 // handle arguments
1176 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1177 args->push_receiver(h_recv); // Push jobject handle
1178
1179 // Fill out JavaCallArguments object
1180 args->iterate( Fingerprinter(method).fingerprint() );
1181 // Initialize result type
1182 result->set_type(args->get_ret_type());
1183
1184 // Invoke the method. Result is returned as oop.
1185 JavaCalls::call(result, method, &java_args, CHECK);
1186
1187 // Convert result
1188 if (is_reference_type(result->get_type())) {
1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1190 }
1191 }
1192
1193
1194 static instanceOop alloc_object(jclass clazz, TRAPS) {
1195 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1196 if (k == NULL) {
1197 ResourceMark rm(THREAD);
1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1199 }
1200 k->check_valid_for_instantiation(false, CHECK_NULL);
1201 k->initialize(CHECK_NULL);
1202 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1203 return ih;
1204 }
1205
1206 DT_RETURN_MARK_DECL(AllocObject, jobject
1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1208
1209 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1210 JNIWrapper("AllocObject");
1211
1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1213
1214 jobject ret = NULL;
1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1216
1217 instanceOop i = alloc_object(clazz, CHECK_NULL);
1218 ret = JNIHandles::make_local(env, i);
1219 return ret;
1220 JNI_END
1221
1222 DT_RETURN_MARK_DECL(NewObjectA, jobject
1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1224
1225 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1226 JNIWrapper("NewObjectA");
1227
1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1229
1230 jobject obj = NULL;
1231 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1232
1233 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1234 if (k == NULL) {
1235 ResourceMark rm(THREAD);
1236 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1237 }
1238
1239 if (!k->is_value()) {
1240 instanceOop i = alloc_object(clazz, CHECK_NULL);
1241 obj = JNIHandles::make_local(env, i);
1242 JavaValue jvalue(T_VOID);
1243 JNI_ArgumentPusherArray ap(methodID, args);
1244 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1245 } else {
1246 JavaValue jvalue(T_VALUETYPE);
1247 JNI_ArgumentPusherArray ap(methodID, args);
1248 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1249 obj = jvalue.get_jobject();
1250 }
1251 return obj;
1252 JNI_END
1253
1254
1255 DT_RETURN_MARK_DECL(NewObjectV, jobject
1256 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1257
1258 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1259 JNIWrapper("NewObjectV");
1260
1261 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1262
1263 jobject obj = NULL;
1264 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1265
1266 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1267 if (k == NULL) {
1268 ResourceMark rm(THREAD);
1269 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1270 }
1271
1272 if (!k->is_value()) {
1273 instanceOop i = alloc_object(clazz, CHECK_NULL);
1274 obj = JNIHandles::make_local(env, i);
1275 JavaValue jvalue(T_VOID);
1276 JNI_ArgumentPusherVaArg ap(methodID, args);
1277 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1278 } else {
1279 JavaValue jvalue(T_VALUETYPE);
1280 JNI_ArgumentPusherVaArg ap(methodID, args);
1281 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1282 obj = jvalue.get_jobject();
1283 }
1284 return obj;
1285 JNI_END
1286
1287
1288 DT_RETURN_MARK_DECL(NewObject, jobject
1289 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1290
1291 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1292 JNIWrapper("NewObject");
1293
1294 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1295
1296 jobject obj = NULL;
1297 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1298
1299 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1300 if (k == NULL) {
1301 ResourceMark rm(THREAD);
1302 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1303 }
1304
1305 if (!k->is_value()) {
1306 instanceOop i = alloc_object(clazz, CHECK_NULL);
1307 obj = JNIHandles::make_local(env, i);
1308 va_list args;
1309 va_start(args, methodID);
1310 JavaValue jvalue(T_VOID);
1311 JNI_ArgumentPusherVaArg ap(methodID, args);
1312 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1313 va_end(args);
1314 } else {
1315 va_list args;
1316 va_start(args, methodID);
1317 JavaValue jvalue(T_VALUETYPE);
1318 JNI_ArgumentPusherVaArg ap(methodID, args);
1319 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL);
1320 va_end(args);
1321 obj = jvalue.get_jobject();
1322 }
1323 return obj;
1324 JNI_END
1325
1326
1327 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1328 JNIWrapper("GetObjectClass");
1329
1330 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1331
1332 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1333 jclass ret =
1334 (jclass) JNIHandles::make_local(env, k->java_mirror());
1335
1336 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1337 return ret;
1338 JNI_END
1339
1340 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1341 JNIWrapper("IsInstanceOf");
1342
1343 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1344
1345 jboolean ret = JNI_TRUE;
1346 if (obj != NULL) {
1347 ret = JNI_FALSE;
1348 Klass* k = java_lang_Class::as_Klass(
1349 JNIHandles::resolve_non_null(clazz));
1350 if (k != NULL) {
1351 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1352 }
1353 }
1354
1355 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1356 return ret;
1357 JNI_END
1358
1359
1360 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1361 const char *sig, bool is_static, TRAPS) {
1362 // %%%% This code should probably just call into a method in the LinkResolver
1363 //
1364 // The class should have been loaded (we have an instance of the class
1365 // passed in) so the method and signature should already be in the symbol
1366 // table. If they're not there, the method doesn't exist.
1367 const char *name_to_probe = (name_str == NULL)
1368 ? vmSymbols::object_initializer_name()->as_C_string()
1369 : name_str;
1370 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1371 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1372
1373 if (name == NULL || signature == NULL) {
1374 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1375 }
1376
1377 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1378
1379 // Throw a NoSuchMethodError exception if we have an instance of a
1380 // primitive java.lang.Class
1381 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1382 ResourceMark rm;
1383 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1384 }
1385
1386 // Make sure class is linked and initialized before handing id's out to
1387 // Method*s.
1388 klass->initialize(CHECK_NULL);
1389
1390 Method* m;
1391 if (name == vmSymbols::object_initializer_name() ||
1392 name == vmSymbols::class_initializer_name()) {
1393 // Never search superclasses for constructors
1394 if (klass->is_instance_klass()) {
1395 m = InstanceKlass::cast(klass)->find_method(name, signature);
1396 } else {
1397 m = NULL;
1398 }
1399 } else {
1400 m = klass->lookup_method(name, signature);
1401 if (m == NULL && klass->is_instance_klass()) {
1402 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1403 }
1404 }
1405 if (m == NULL || (m->is_static() != is_static)) {
1406 ResourceMark rm;
1407 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1408 }
1409 return m->jmethod_id();
1410 }
1411
1412
1413 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1414 const char *name, const char *sig))
1415 JNIWrapper("GetMethodID");
1416 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1417 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1418 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1419 return ret;
1420 JNI_END
1421
1422
1423 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1424 const char *name, const char *sig))
1425 JNIWrapper("GetStaticMethodID");
1426 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1427 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1428 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1429 return ret;
1430 JNI_END
1431
1432
1433
1434 //
1435 // Calling Methods
1436 //
1437
1438
1439 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1440 , EntryProbe, ReturnProbe) \
1441 \
1442 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1443 , ReturnProbe); \
1444 \
1445 JNI_ENTRY(ResultType, \
1446 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1447 JNIWrapper("Call" XSTR(Result) "Method"); \
1448 \
1449 EntryProbe; \
1450 ResultType ret = 0;\
1451 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1452 (const ResultType&)ret);\
1453 \
1454 va_list args; \
1455 va_start(args, methodID); \
1456 JavaValue jvalue(Tag); \
1457 JNI_ArgumentPusherVaArg ap(methodID, args); \
1458 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1459 va_end(args); \
1460 ret = jvalue.get_##ResultType(); \
1461 return ret;\
1462 JNI_END
1463
1464 // the runtime type of subword integral basic types is integer
1465 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1466 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1467 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1468 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1469 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1471 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1472 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1473 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1474 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1475 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1477
1478 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1479 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1481 DEFINE_CALLMETHOD(jint, Int, T_INT,
1482 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1484 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1485 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1487 // Float and double probes don't return value because dtrace doesn't currently support it
1488 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1489 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1491 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1492 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1494
1495 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1496 , EntryProbe, ReturnProbe) \
1497 \
1498 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1499 , ReturnProbe); \
1500 \
1501 JNI_ENTRY(ResultType, \
1502 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1503 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1504 \
1505 EntryProbe;\
1506 ResultType ret = 0;\
1507 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1508 (const ResultType&)ret);\
1509 \
1510 JavaValue jvalue(Tag); \
1511 JNI_ArgumentPusherVaArg ap(methodID, args); \
1512 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1513 ret = jvalue.get_##ResultType(); \
1514 return ret;\
1515 JNI_END
1516
1517 // the runtime type of subword integral basic types is integer
1518 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1519 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1521 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1522 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1524 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1525 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1527 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1528 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1530
1531 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1532 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1534 DEFINE_CALLMETHODV(jint, Int, T_INT,
1535 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1537 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1538 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1540 // Float and double probes don't return value because dtrace doesn't currently support it
1541 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1542 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1543 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1544 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1545 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1547
1548 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1549 , EntryProbe, ReturnProbe) \
1550 \
1551 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1552 , ReturnProbe); \
1553 \
1554 JNI_ENTRY(ResultType, \
1555 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1556 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1557 EntryProbe; \
1558 ResultType ret = 0;\
1559 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1560 (const ResultType&)ret);\
1561 \
1562 JavaValue jvalue(Tag); \
1563 JNI_ArgumentPusherArray ap(methodID, args); \
1564 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1565 ret = jvalue.get_##ResultType(); \
1566 return ret;\
1567 JNI_END
1568
1569 // the runtime type of subword integral basic types is integer
1570 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1571 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1572 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1573 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1574 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1575 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1576 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1577 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1578 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1579 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1580 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1581 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1582
1583 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1584 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1585 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1586 DEFINE_CALLMETHODA(jint, Int, T_INT,
1587 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1588 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1589 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1590 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1591 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1592 // Float and double probes don't return value because dtrace doesn't currently support it
1593 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1594 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1595 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1596 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1597 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1598 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1599
1600 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1601 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1602 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1603
1604
1605 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1606 JNIWrapper("CallVoidMethod");
1607 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1608 DT_VOID_RETURN_MARK(CallVoidMethod);
1609
1610 va_list args;
1611 va_start(args, methodID);
1612 JavaValue jvalue(T_VOID);
1613 JNI_ArgumentPusherVaArg ap(methodID, args);
1614 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1615 va_end(args);
1616 JNI_END
1617
1618
1619 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1620 JNIWrapper("CallVoidMethodV");
1621 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1622 DT_VOID_RETURN_MARK(CallVoidMethodV);
1623
1624 JavaValue jvalue(T_VOID);
1625 JNI_ArgumentPusherVaArg ap(methodID, args);
1626 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1627 JNI_END
1628
1629
1630 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1631 JNIWrapper("CallVoidMethodA");
1632 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1633 DT_VOID_RETURN_MARK(CallVoidMethodA);
1634
1635 JavaValue jvalue(T_VOID);
1636 JNI_ArgumentPusherArray ap(methodID, args);
1637 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1638 JNI_END
1639
1640
1641
1642 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1643 , EntryProbe, ReturnProbe) \
1644 \
1645 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1646 , ReturnProbe);\
1647 \
1648 JNI_ENTRY(ResultType, \
1649 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1650 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1651 \
1652 EntryProbe;\
1653 ResultType ret;\
1654 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1655 (const ResultType&)ret);\
1656 \
1657 va_list args; \
1658 va_start(args, methodID); \
1659 JavaValue jvalue(Tag); \
1660 JNI_ArgumentPusherVaArg ap(methodID, args); \
1661 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1662 va_end(args); \
1663 ret = jvalue.get_##ResultType(); \
1664 return ret;\
1665 JNI_END
1666
1667 // the runtime type of subword integral basic types is integer
1668 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1669 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1670 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1671 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1672 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1673 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1674 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1675 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1677 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1678 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1680
1681 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1682 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1685 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1688 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 // Float and double probes don't return value because dtrace doesn't currently support it
1690 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1692 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1694 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1695 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1697
1698 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1699 , EntryProbe, ReturnProbe) \
1700 \
1701 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1702 , ReturnProbe);\
1703 \
1704 JNI_ENTRY(ResultType, \
1705 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1706 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1707 \
1708 EntryProbe;\
1709 ResultType ret;\
1710 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1711 (const ResultType&)ret);\
1712 \
1713 JavaValue jvalue(Tag); \
1714 JNI_ArgumentPusherVaArg ap(methodID, args); \
1715 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1716 ret = jvalue.get_##ResultType(); \
1717 return ret;\
1718 JNI_END
1719
1720 // the runtime type of subword integral basic types is integer
1721 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1722 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1723 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1724 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1725 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1726 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1727 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1728 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1729 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1730 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1731 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1733
1734 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1735 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1738 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1741 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 // Float and double probes don't return value because dtrace doesn't currently support it
1743 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1745 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1747 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1748 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1750
1751 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1752 , EntryProbe, ReturnProbe) \
1753 \
1754 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1755 , ReturnProbe);\
1756 \
1757 JNI_ENTRY(ResultType, \
1758 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1759 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1760 \
1761 EntryProbe;\
1762 ResultType ret;\
1763 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1764 (const ResultType&)ret);\
1765 \
1766 JavaValue jvalue(Tag); \
1767 JNI_ArgumentPusherArray ap(methodID, args); \
1768 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1769 ret = jvalue.get_##ResultType(); \
1770 return ret;\
1771 JNI_END
1772
1773 // the runtime type of subword integral basic types is integer
1774 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1775 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1776 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1777 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1778 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1779 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1780 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1781 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1782 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1783 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1784 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1785 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1786
1787 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1788 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1789 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1790 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1791 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1792 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1793 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1794 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1795 // Float and double probes don't return value because dtrace doesn't currently support it
1796 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1797 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1798 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1799 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1800 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1801 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1802 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1803
1804 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1805 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1806 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1807 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1808 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1809 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1810
1811 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1812 JNIWrapper("CallNonvirtualVoidMethod");
1813
1814 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1815 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1816
1817 va_list args;
1818 va_start(args, methodID);
1819 JavaValue jvalue(T_VOID);
1820 JNI_ArgumentPusherVaArg ap(methodID, args);
1821 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1822 va_end(args);
1823 JNI_END
1824
1825
1826 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1827 JNIWrapper("CallNonvirtualVoidMethodV");
1828
1829 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1830 env, obj, cls, (uintptr_t) methodID);
1831 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1832
1833 JavaValue jvalue(T_VOID);
1834 JNI_ArgumentPusherVaArg ap(methodID, args);
1835 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1836 JNI_END
1837
1838
1839 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1840 JNIWrapper("CallNonvirtualVoidMethodA");
1841 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1842 env, obj, cls, (uintptr_t) methodID);
1843 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1844 JavaValue jvalue(T_VOID);
1845 JNI_ArgumentPusherArray ap(methodID, args);
1846 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1847 JNI_END
1848
1849
1850
1851 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1852 , EntryProbe, ResultProbe) \
1853 \
1854 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1855 , ResultProbe); \
1856 \
1857 JNI_ENTRY(ResultType, \
1858 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1859 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1860 \
1861 EntryProbe; \
1862 ResultType ret = 0;\
1863 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1864 (const ResultType&)ret);\
1865 \
1866 va_list args; \
1867 va_start(args, methodID); \
1868 JavaValue jvalue(Tag); \
1869 JNI_ArgumentPusherVaArg ap(methodID, args); \
1870 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1871 va_end(args); \
1872 ret = jvalue.get_##ResultType(); \
1873 return ret;\
1874 JNI_END
1875
1876 // the runtime type of subword integral basic types is integer
1877 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1878 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1879 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1880 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1881 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1882 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1883 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1884 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1885 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1886 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1887 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1889
1890 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1891 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1893 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1894 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1897 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1899 // Float and double probes don't return value because dtrace doesn't currently support it
1900 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1901 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1903 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1904 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1906
1907 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1908 , EntryProbe, ResultProbe) \
1909 \
1910 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1911 , ResultProbe); \
1912 \
1913 JNI_ENTRY(ResultType, \
1914 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1915 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1916 \
1917 EntryProbe; \
1918 ResultType ret = 0;\
1919 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1920 (const ResultType&)ret);\
1921 \
1922 JavaValue jvalue(Tag); \
1923 JNI_ArgumentPusherVaArg ap(methodID, args); \
1924 /* Make sure class is initialized before trying to invoke its method */ \
1925 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1926 k->initialize(CHECK_0); \
1927 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1928 va_end(args); \
1929 ret = jvalue.get_##ResultType(); \
1930 return ret;\
1931 JNI_END
1932
1933 // the runtime type of subword integral basic types is integer
1934 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1935 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1936 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1937 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1938 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1939 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1940 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1941 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1942 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1943 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1944 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1946
1947 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1948 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1951 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1953 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1954 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1956 // Float and double probes don't return value because dtrace doesn't currently support it
1957 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1958 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1960 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1961 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1963
1964 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1965 , EntryProbe, ResultProbe) \
1966 \
1967 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1968 , ResultProbe); \
1969 \
1970 JNI_ENTRY(ResultType, \
1971 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1972 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1973 \
1974 EntryProbe; \
1975 ResultType ret = 0;\
1976 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1977 (const ResultType&)ret);\
1978 \
1979 JavaValue jvalue(Tag); \
1980 JNI_ArgumentPusherArray ap(methodID, args); \
1981 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1982 ret = jvalue.get_##ResultType(); \
1983 return ret;\
1984 JNI_END
1985
1986 // the runtime type of subword integral basic types is integer
1987 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1988 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1989 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1990 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1991 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1992 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1993 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1994 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1995 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1996 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1997 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1998 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1999
2000 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
2001 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2002 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
2003 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
2004 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2005 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
2006 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
2007 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2008 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
2009 // Float and double probes don't return value because dtrace doesn't currently support it
2010 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
2011 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2012 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
2013 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
2014 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
2015 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
2016
2017 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
2018 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
2019 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
2020 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
2021 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
2022 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
2023
2024 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
2025 JNIWrapper("CallStaticVoidMethod");
2026 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
2027 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
2028
2029 va_list args;
2030 va_start(args, methodID);
2031 JavaValue jvalue(T_VOID);
2032 JNI_ArgumentPusherVaArg ap(methodID, args);
2033 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2034 va_end(args);
2035 JNI_END
2036
2037
2038 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2039 JNIWrapper("CallStaticVoidMethodV");
2040 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2041 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2042
2043 JavaValue jvalue(T_VOID);
2044 JNI_ArgumentPusherVaArg ap(methodID, args);
2045 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2046 JNI_END
2047
2048
2049 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2050 JNIWrapper("CallStaticVoidMethodA");
2051 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2052 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2053
2054 JavaValue jvalue(T_VOID);
2055 JNI_ArgumentPusherArray ap(methodID, args);
2056 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2057 JNI_END
2058
2059
2060 //
2061 // Accessing Fields
2062 //
2063
2064
2065 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2066 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2067
2068 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2069 const char *name, const char *sig))
2070 JNIWrapper("GetFieldID");
2071 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2072 jfieldID ret = 0;
2073 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2074
2075 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2076
2077 // The class should have been loaded (we have an instance of the class
2078 // passed in) so the field and signature should already be in the symbol
2079 // table. If they're not there, the field doesn't exist.
2080 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2081 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2082 if (fieldname == NULL || signame == NULL) {
2083 ResourceMark rm;
2084 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2085 }
2086
2087 // Make sure class is initialized before handing id's out to fields
2088 k->initialize(CHECK_NULL);
2089
2090 fieldDescriptor fd;
2091 if (!k->is_instance_klass() ||
2092 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2093 ResourceMark rm;
2094 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2095 }
2096
2097 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2098 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2099 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flattened());
2100 return ret;
2101 JNI_END
2102
2103
2104 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2105 JNIWrapper("GetObjectField");
2106 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2107 oop o = JNIHandles::resolve_non_null(obj);
2108 Klass* k = o->klass();
2109 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2110 oop res = NULL;
2111 // Keep JVMTI addition small and only check enabled flag here.
2112 // jni_GetField_probe() assumes that is okay to create handles.
2113 if (JvmtiExport::should_post_field_access()) {
2114 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2115 }
2116 if (!jfieldIDWorkaround::is_flattened_field(fieldID)) {
2117 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2118 } else {
2119 assert(k->is_instance_klass(), "Only instance can have flattened fields");
2120 InstanceKlass* ik = InstanceKlass::cast(k);
2121 fieldDescriptor fd;
2122 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck
2123 InstanceKlass* holder = fd.field_holder();
2124 ValueKlass* field_vklass = ValueKlass::cast(holder->get_value_field_klass(fd.index()));
2125 res = field_vklass->read_flattened_field(o, ik->field_offset(fd.index()), CHECK_NULL);
2126 }
2127 jobject ret = JNIHandles::make_local(env, res);
2128 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2129 return ret;
2130 JNI_END
2131
2132
2133
2134 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2135 , EntryProbe, ReturnProbe) \
2136 \
2137 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2138 , ReturnProbe); \
2139 \
2140 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2141 JNIWrapper("Get" XSTR(Result) "Field"); \
2142 \
2143 EntryProbe; \
2144 Return ret = 0;\
2145 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2146 \
2147 oop o = JNIHandles::resolve_non_null(obj); \
2148 Klass* k = o->klass(); \
2149 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2150 /* Keep JVMTI addition small and only check enabled flag here. */ \
2151 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2152 /* and creates a ResetNoHandleMark. */ \
2153 if (JvmtiExport::should_post_field_access()) { \
2154 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2155 } \
2156 ret = o->Fieldname##_field(offset); \
2157 return ret; \
2158 JNI_END
2159
2160 DEFINE_GETFIELD(jboolean, bool, Boolean
2161 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2162 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2163 DEFINE_GETFIELD(jbyte, byte, Byte
2164 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2165 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2166 DEFINE_GETFIELD(jchar, char, Char
2167 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2168 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2169 DEFINE_GETFIELD(jshort, short, Short
2170 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2171 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2172 DEFINE_GETFIELD(jint, int, Int
2173 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2174 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2175 DEFINE_GETFIELD(jlong, long, Long
2176 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2177 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2178 // Float and double probes don't return value because dtrace doesn't currently support it
2179 DEFINE_GETFIELD(jfloat, float, Float
2180 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2181 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2182 DEFINE_GETFIELD(jdouble, double, Double
2183 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2184 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2185
2186 address jni_GetBooleanField_addr() {
2187 return (address)jni_GetBooleanField;
2188 }
2189 address jni_GetByteField_addr() {
2190 return (address)jni_GetByteField;
2191 }
2192 address jni_GetCharField_addr() {
2193 return (address)jni_GetCharField;
2194 }
2195 address jni_GetShortField_addr() {
2196 return (address)jni_GetShortField;
2197 }
2198 address jni_GetIntField_addr() {
2199 return (address)jni_GetIntField;
2200 }
2201 address jni_GetLongField_addr() {
2202 return (address)jni_GetLongField;
2203 }
2204 address jni_GetFloatField_addr() {
2205 return (address)jni_GetFloatField;
2206 }
2207 address jni_GetDoubleField_addr() {
2208 return (address)jni_GetDoubleField;
2209 }
2210
2211 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2212 JNIWrapper("SetObjectField");
2213 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2214 oop o = JNIHandles::resolve_non_null(obj);
2215 Klass* k = o->klass();
2216 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2217 // Keep JVMTI addition small and only check enabled flag here.
2218 // jni_SetField_probe_nh() assumes that is not okay to create handles
2219 // and creates a ResetNoHandleMark.
2220 if (JvmtiExport::should_post_field_modification()) {
2221 jvalue field_value;
2222 field_value.l = value;
2223 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2224 }
2225 if (!jfieldIDWorkaround::is_flattened_field(fieldID)) {
2226 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2227 } else {
2228 assert(k->is_instance_klass(), "Only instances can have flattened fields");
2229 InstanceKlass* ik = InstanceKlass::cast(k);
2230 fieldDescriptor fd;
2231 ik->find_field_from_offset(offset, false, &fd);
2232 InstanceKlass* holder = fd.field_holder();
2233 ValueKlass* vklass = ValueKlass::cast(holder->get_value_field_klass(fd.index()));
2234 oop v = JNIHandles::resolve_non_null(value);
2235 vklass->write_flattened_field(o, offset, v, CHECK);
2236 }
2237 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2238 JNI_END
2239
2240
2241 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2242 , EntryProbe, ReturnProbe) \
2243 \
2244 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2245 JNIWrapper("Set" XSTR(Result) "Field"); \
2246 \
2247 EntryProbe; \
2248 \
2249 oop o = JNIHandles::resolve_non_null(obj); \
2250 Klass* k = o->klass(); \
2251 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2252 /* Keep JVMTI addition small and only check enabled flag here. */ \
2253 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2254 /* and creates a ResetNoHandleMark. */ \
2255 if (JvmtiExport::should_post_field_modification()) { \
2256 jvalue field_value; \
2257 field_value.unionType = value; \
2258 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2259 } \
2260 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2261 o->Fieldname##_field_put(offset, value); \
2262 ReturnProbe; \
2263 JNI_END
2264
2265 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2266 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2267 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2268 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2269 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2270 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2271 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2272 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2273 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2274 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2275 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2276 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2277 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2278 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2279 HOTSPOT_JNI_SETINTFIELD_RETURN())
2280 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2281 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2282 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2283 // Float and double probes don't return value because dtrace doesn't currently support it
2284 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2285 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2286 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2287 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2288 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2289 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2290
2291 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2292 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2293
2294 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2295 JNIWrapper("ToReflectedField");
2296 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2297 jobject ret = NULL;
2298 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2299
2300 fieldDescriptor fd;
2301 bool found = false;
2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2303
2304 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2305
2306 if (isStatic) {
2307 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2308 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2309 assert(id->is_static_field_id(), "invalid static field id");
2310 found = id->find_local_field(&fd);
2311 } else {
2312 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2313 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2314 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2315 }
2316 assert(found, "bad fieldID passed into jni_ToReflectedField");
2317 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2318 ret = JNIHandles::make_local(env, reflected);
2319 return ret;
2320 JNI_END
2321
2322
2323 //
2324 // Accessing Static Fields
2325 //
2326 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2327 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2328
2329 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2330 const char *name, const char *sig))
2331 JNIWrapper("GetStaticFieldID");
2332 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2333 jfieldID ret = NULL;
2334 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2335
2336 // The class should have been loaded (we have an instance of the class
2337 // passed in) so the field and signature should already be in the symbol
2338 // table. If they're not there, the field doesn't exist.
2339 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2340 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2341 if (fieldname == NULL || signame == NULL) {
2342 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2343 }
2344 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2345 // Make sure class is initialized before handing id's out to static fields
2346 k->initialize(CHECK_NULL);
2347
2348 fieldDescriptor fd;
2349 if (!k->is_instance_klass() ||
2350 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2351 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2352 }
2353
2354 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2355 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2356 debug_only(id->set_is_static_field_id();)
2357
2358 debug_only(id->verify(fd.field_holder()));
2359
2360 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2361 return ret;
2362 JNI_END
2363
2364
2365 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2366 JNIWrapper("GetStaticObjectField");
2367 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2368 #if INCLUDE_JNI_CHECK
2369 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2370 #endif // INCLUDE_JNI_CHECK
2371 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2372 assert(id->is_static_field_id(), "invalid static field id");
2373 // Keep JVMTI addition small and only check enabled flag here.
2374 // jni_GetField_probe() assumes that is okay to create handles.
2375 if (JvmtiExport::should_post_field_access()) {
2376 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2377 }
2378 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2379 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2380 return ret;
2381 JNI_END
2382
2383
2384 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2385 , EntryProbe, ReturnProbe) \
2386 \
2387 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2388 , ReturnProbe); \
2389 \
2390 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2391 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2392 EntryProbe; \
2393 Return ret = 0;\
2394 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2395 (const Return&)ret);\
2396 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2397 assert(id->is_static_field_id(), "invalid static field id"); \
2398 /* Keep JVMTI addition small and only check enabled flag here. */ \
2399 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2400 if (JvmtiExport::should_post_field_access()) { \
2401 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2402 } \
2403 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2404 return ret;\
2405 JNI_END
2406
2407 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2408 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2409 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2410 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2411 DEFINE_GETSTATICFIELD(jchar, char, Char
2412 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2413 DEFINE_GETSTATICFIELD(jshort, short, Short
2414 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2415 DEFINE_GETSTATICFIELD(jint, int, Int
2416 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2417 DEFINE_GETSTATICFIELD(jlong, long, Long
2418 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2419 // Float and double probes don't return value because dtrace doesn't currently support it
2420 DEFINE_GETSTATICFIELD(jfloat, float, Float
2421 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2422 DEFINE_GETSTATICFIELD(jdouble, double, Double
2423 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2424
2425 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2426 JNIWrapper("SetStaticObjectField");
2427 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2428 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2429 assert(id->is_static_field_id(), "invalid static field id");
2430 // Keep JVMTI addition small and only check enabled flag here.
2431 // jni_SetField_probe() assumes that is okay to create handles.
2432 if (JvmtiExport::should_post_field_modification()) {
2433 jvalue field_value;
2434 field_value.l = value;
2435 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2436 }
2437 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2438 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2439 JNI_END
2440
2441
2442
2443 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2444 , EntryProbe, ReturnProbe) \
2445 \
2446 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2447 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2448 EntryProbe; \
2449 \
2450 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2451 assert(id->is_static_field_id(), "invalid static field id"); \
2452 /* Keep JVMTI addition small and only check enabled flag here. */ \
2453 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2454 if (JvmtiExport::should_post_field_modification()) { \
2455 jvalue field_value; \
2456 field_value.unionType = value; \
2457 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2458 } \
2459 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \
2460 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2461 ReturnProbe;\
2462 JNI_END
2463
2464 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z
2465 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2466 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2467 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b
2468 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2469 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2470 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c
2471 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2472 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2473 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s
2474 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2475 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2476 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i
2477 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2478 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2479 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j
2480 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2481 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2482 // Float and double probes don't return value because dtrace doesn't currently support it
2483 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f
2484 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2485 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2486 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d
2487 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2488 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2489
2490 //
2491 // String Operations
2492 //
2493
2494 // Unicode Interface
2495
2496 DT_RETURN_MARK_DECL(NewString, jstring
2497 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2498
2499 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2500 JNIWrapper("NewString");
2501 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2502 jstring ret = NULL;
2503 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2504 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2505 ret = (jstring) JNIHandles::make_local(env, string);
2506 return ret;
2507 JNI_END
2508
2509
2510 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2511 JNIWrapper("GetStringLength");
2512 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2513 jsize ret = 0;
2514 oop s = JNIHandles::resolve_non_null(string);
2515 ret = java_lang_String::length(s);
2516 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2517 return ret;
2518 JNI_END
2519
2520
2521 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2522 JNIEnv *env, jstring string, jboolean *isCopy))
2523 JNIWrapper("GetStringChars");
2524 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2525 jchar* buf = NULL;
2526 oop s = JNIHandles::resolve_non_null(string);
2527 typeArrayOop s_value = java_lang_String::value(s);
2528 if (s_value != NULL) {
2529 int s_len = java_lang_String::length(s, s_value);
2530 bool is_latin1 = java_lang_String::is_latin1(s);
2531 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2532 /* JNI Specification states return NULL on OOM */
2533 if (buf != NULL) {
2534 if (s_len > 0) {
2535 if (!is_latin1) {
2536 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2537 buf, s_len);
2538 } else {
2539 for (int i = 0; i < s_len; i++) {
2540 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2541 }
2542 }
2543 }
2544 buf[s_len] = 0;
2545 //%note jni_5
2546 if (isCopy != NULL) {
2547 *isCopy = JNI_TRUE;
2548 }
2549 }
2550 }
2551 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2552 return buf;
2553 JNI_END
2554
2555
2556 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2557 JNIWrapper("ReleaseStringChars");
2558 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2559 //%note jni_6
2560 if (chars != NULL) {
2561 // Since String objects are supposed to be immutable, don't copy any
2562 // new data back. A bad user will have to go after the char array.
2563 FreeHeap((void*) chars);
2564 }
2565 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2566 JNI_END
2567
2568
2569 // UTF Interface
2570
2571 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2572 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2573
2574 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2575 JNIWrapper("NewStringUTF");
2576 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2577 jstring ret;
2578 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2579
2580 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2581 ret = (jstring) JNIHandles::make_local(env, result);
2582 return ret;
2583 JNI_END
2584
2585
2586 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2587 JNIWrapper("GetStringUTFLength");
2588 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2589 oop java_string = JNIHandles::resolve_non_null(string);
2590 jsize ret = java_lang_String::utf8_length(java_string);
2591 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2592 return ret;
2593 JNI_END
2594
2595
2596 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2597 JNIWrapper("GetStringUTFChars");
2598 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2599 char* result = NULL;
2600 oop java_string = JNIHandles::resolve_non_null(string);
2601 typeArrayOop s_value = java_lang_String::value(java_string);
2602 if (s_value != NULL) {
2603 size_t length = java_lang_String::utf8_length(java_string, s_value);
2604 /* JNI Specification states return NULL on OOM */
2605 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2606 if (result != NULL) {
2607 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2608 if (isCopy != NULL) {
2609 *isCopy = JNI_TRUE;
2610 }
2611 }
2612 }
2613 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2614 return result;
2615 JNI_END
2616
2617
2618 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2619 JNIWrapper("ReleaseStringUTFChars");
2620 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2621 if (chars != NULL) {
2622 FreeHeap((char*) chars);
2623 }
2624 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2625 JNI_END
2626
2627
2628 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2629 JNIWrapper("GetArrayLength");
2630 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2631 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2632 assert(a->is_array(), "must be array");
2633 jsize ret = a->length();
2634 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2635 return ret;
2636 JNI_END
2637
2638
2639 //
2640 // Object Array Operations
2641 //
2642
2643 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2644 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2645
2646 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2647 JNIWrapper("NewObjectArray");
2648 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2649 jobjectArray ret = NULL;
2650 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2651 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2652 Klass* ak = ek->array_klass(CHECK_NULL);
2653 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2654 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2655 oop initial_value = JNIHandles::resolve(initialElement);
2656 if (initial_value != NULL) { // array already initialized with NULL
2657 for (int index = 0; index < length; index++) {
2658 result->obj_at_put(index, initial_value);
2659 }
2660 }
2661 ret = (jobjectArray) JNIHandles::make_local(env, result);
2662 return ret;
2663 JNI_END
2664
2665 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2666 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2667
2668 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2669 JNIWrapper("GetObjectArrayElement");
2670 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2671 jobject ret = NULL;
2672 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2673 oop res = NULL;
2674 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2675 if (arr->is_within_bounds(index)) {
2676 if (arr->is_valueArray()) {
2677 valueArrayOop a = valueArrayOop(JNIHandles::resolve_non_null(array));
2678 arrayHandle ah(THREAD, a);
2679 valueArrayHandle vah(thread, a);
2680 res = valueArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2681 assert(res != NULL, "Must be set in one of two paths above");
2682 } else {
2683 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2684 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2685 res = a->obj_at(index);
2686 }
2687 } else {
2688 ResourceMark rm(THREAD);
2689 stringStream ss;
2690 ss.print("Index %d out of bounds for length %d", index,arr->length());
2691 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2692 }
2693 ret = JNIHandles::make_local(env, res);
2694 return ret;
2695 JNI_END
2696
2697 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2698 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2699
2700 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2701 JNIWrapper("SetObjectArrayElement");
2702 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2703 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2704
2705 bool oob = false;
2706 int length = -1;
2707 oop res = NULL;
2708 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2709 if (arr->is_within_bounds(index)) {
2710 if (arr->is_valueArray()) {
2711 valueArrayOop a = valueArrayOop(JNIHandles::resolve_non_null(array));
2712 oop v = JNIHandles::resolve(value);
2713 ValueArrayKlass* vaklass = ValueArrayKlass::cast(a->klass());
2714 ValueKlass* element_vklass = vaklass->element_klass();
2715 if (v != NULL && v->is_a(element_vklass)) {
2716 a->value_copy_to_index(v, index);
2717 } else {
2718 ResourceMark rm(THREAD);
2719 stringStream ss;
2720 Klass *kl = ValueArrayKlass::cast(a->klass());
2721 ss.print("type mismatch: can not store %s to %s[%d]",
2722 v->klass()->external_name(),
2723 kl->external_name(),
2724 index);
2725 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2726 ss.print("[]");
2727 }
2728 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2729 }
2730 } else {
2731 assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2732 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2733 oop v = JNIHandles::resolve(value);
2734 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2735 a->obj_at_put(index, v);
2736 } else {
2737 ResourceMark rm(THREAD);
2738 stringStream ss;
2739 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2740 ss.print("type mismatch: can not store %s to %s[%d]",
2741 v->klass()->external_name(),
2742 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2743 index);
2744 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2745 ss.print("[]");
2746 }
2747 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2748 }
2749 }
2750 } else {
2751 ResourceMark rm(THREAD);
2752 stringStream ss;
2753 ss.print("Index %d out of bounds for length %d", index, arr->length());
2754 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2755 }
2756 JNI_END
2757
2758
2759
2760 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2761 ,EntryProbe,ReturnProbe) \
2762 \
2763 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2764 , ReturnProbe); \
2765 \
2766 JNI_ENTRY(Return, \
2767 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2768 JNIWrapper("New" XSTR(Result) "Array"); \
2769 EntryProbe; \
2770 Return ret = NULL;\
2771 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2772 \
2773 oop obj= oopFactory::Allocator(len, CHECK_0); \
2774 ret = (Return) JNIHandles::make_local(env, obj); \
2775 return ret;\
2776 JNI_END
2777
2778 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2779 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2780 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2781 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2782 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2783 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2784 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2785 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2786 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2787 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2788 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2789 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2790 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2791 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2792 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2793 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2794 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2795 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2796 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float,
2797 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2798 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2799 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2800 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2801 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2802
2803 // Return an address which will fault if the caller writes to it.
2804
2805 static char* get_bad_address() {
2806 static char* bad_address = NULL;
2807 if (bad_address == NULL) {
2808 size_t size = os::vm_allocation_granularity();
2809 bad_address = os::reserve_memory(size);
2810 if (bad_address != NULL) {
2811 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2812 /*is_committed*/false);
2813 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2814 }
2815 }
2816 return bad_address;
2817 }
2818
2819
2820
2821 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2822 , EntryProbe, ReturnProbe) \
2823 \
2824 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2825 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2826 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2827 EntryProbe; \
2828 /* allocate an chunk of memory in c land */ \
2829 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2830 ElementType* result; \
2831 int len = a->length(); \
2832 if (len == 0) { \
2833 if (isCopy != NULL) { \
2834 *isCopy = JNI_FALSE; \
2835 } \
2836 /* Empty array: legal but useless, can't return NULL. \
2837 * Return a pointer to something useless. \
2838 * Avoid asserts in typeArrayOop. */ \
2839 result = (ElementType*)get_bad_address(); \
2840 } else { \
2841 /* JNI Specification states return NULL on OOM */ \
2842 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2843 if (result != NULL) { \
2844 /* copy the array to the c chunk */ \
2845 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2846 result, len); \
2847 if (isCopy) { \
2848 *isCopy = JNI_TRUE; \
2849 } \
2850 } \
2851 } \
2852 ReturnProbe; \
2853 return result; \
2854 JNI_END
2855
2856 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2857 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2858 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2859 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2860 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2861 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2862 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2863 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2864 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2865 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2866 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2867 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2868 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2869 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2870 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2871 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2872 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2873 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2874 // Float and double probes don't return value because dtrace doesn't currently support it
2875 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2876 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2877 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2878 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2879 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2880 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2881
2882
2883 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2884 , EntryProbe, ReturnProbe);\
2885 \
2886 JNI_ENTRY_NO_PRESERVE(void, \
2887 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2888 ElementType *buf, jint mode)) \
2889 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2890 EntryProbe; \
2891 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2892 int len = a->length(); \
2893 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2894 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2895 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2896 } \
2897 if ((mode == 0) || (mode == JNI_ABORT)) { \
2898 FreeHeap(buf); \
2899 } \
2900 } \
2901 ReturnProbe; \
2902 JNI_END
2903
2904 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2905 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2906 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2907 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2908 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2909 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2910 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2911 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2912 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2913 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2914 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2915 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2916 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2917 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2918 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2919 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2920 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2921 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2922 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2923 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2924 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2925 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2926 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2927 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2928
2929 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2930 ResourceMark rm(THREAD);
2931 if (copy_len < 0) {
2932 stringStream ss;
2933 ss.print("Length %d is negative", copy_len);
2934 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2935 } else if (start < 0 || (start > array_len - copy_len)) {
2936 stringStream ss;
2937 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2938 start, (int64_t)start+(int64_t)copy_len, array_len);
2939 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2940 }
2941 }
2942
2943 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2944 , EntryProbe, ReturnProbe); \
2945 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2946 , ReturnProbe); \
2947 \
2948 JNI_ENTRY(void, \
2949 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2950 jsize len, ElementType *buf)) \
2951 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2952 EntryProbe; \
2953 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2954 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2955 check_bounds(start, len, src->length(), CHECK); \
2956 if (len > 0) { \
2957 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2958 } \
2959 JNI_END
2960
2961 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2962 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2963 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2964 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2965 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2966 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2967 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2968 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2969 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2970 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2971 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2972 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2973 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2974 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2975 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2976 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2977 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2978 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2979 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2980 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2981 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2982 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2983 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2984 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2985
2986
2987 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2988 , EntryProbe, ReturnProbe); \
2989 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2990 ,ReturnProbe); \
2991 \
2992 JNI_ENTRY(void, \
2993 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2994 jsize len, const ElementType *buf)) \
2995 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2996 EntryProbe; \
2997 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2998 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2999 check_bounds(start, len, dst->length(), CHECK); \
3000 if (len > 0) { \
3001 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
3002 } \
3003 JNI_END
3004
3005 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
3006 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
3007 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
3008 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
3009 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
3010 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
3011 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
3012 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
3013 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
3014 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
3015 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
3016 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
3017 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
3018 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
3019 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
3020 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
3021 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
3022 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
3023 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
3024 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
3025 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
3026 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
3027 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
3028 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
3029
3030
3031 DT_RETURN_MARK_DECL(RegisterNatives, jint
3032 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3033
3034 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3035 const JNINativeMethod *methods,
3036 jint nMethods))
3037 JNIWrapper("RegisterNatives");
3038 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3039 jint ret = 0;
3040 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3041
3042 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3043
3044 for (int index = 0; index < nMethods; index++) {
3045 const char* meth_name = methods[index].name;
3046 const char* meth_sig = methods[index].signature;
3047 int meth_name_len = (int)strlen(meth_name);
3048
3049 // The class should have been loaded (we have an instance of the class
3050 // passed in) so the method and signature should already be in the symbol
3051 // table. If they're not there, the method doesn't exist.
3052 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3053 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3054
3055 if (name == NULL || signature == NULL) {
3056 ResourceMark rm;
3057 stringStream st;
3058 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3059 // Must return negative value on failure
3060 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3061 }
3062
3063 bool res = Method::register_native(k, name, signature,
3064 (address) methods[index].fnPtr, THREAD);
3065 if (!res) {
3066 ret = -1;
3067 break;
3068 }
3069 }
3070 return ret;
3071 JNI_END
3072
3073
3074 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3075 JNIWrapper("UnregisterNatives");
3076 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3077 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3078 //%note jni_2
3079 if (k->is_instance_klass()) {
3080 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3081 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3082 if (m->is_native()) {
3083 m->clear_native_function();
3084 m->set_signature_handler(NULL);
3085 }
3086 }
3087 }
3088 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3089 return 0;
3090 JNI_END
3091
3092 //
3093 // Monitor functions
3094 //
3095
3096 DT_RETURN_MARK_DECL(MonitorEnter, jint
3097 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3098
3099 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3100 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3101 jint ret = JNI_ERR;
3102 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3103
3104 // If the object is null, we can't do anything with it
3105 if (jobj == NULL) {
3106 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3107 }
3108
3109 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3110 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3111 ret = JNI_OK;
3112 return ret;
3113 JNI_END
3114
3115 DT_RETURN_MARK_DECL(MonitorExit, jint
3116 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3117
3118 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3119 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3120 jint ret = JNI_ERR;
3121 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3122
3123 // Don't do anything with a null object
3124 if (jobj == NULL) {
3125 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3126 }
3127
3128 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3129 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3130
3131 ret = JNI_OK;
3132 return ret;
3133 JNI_END
3134
3135 //
3136 // Extensions
3137 //
3138
3139 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3140 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3141
3142 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3143 JNIWrapper("GetStringRegion");
3144 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3145 DT_VOID_RETURN_MARK(GetStringRegion);
3146 oop s = JNIHandles::resolve_non_null(string);
3147 typeArrayOop s_value = java_lang_String::value(s);
3148 int s_len = java_lang_String::length(s, s_value);
3149 if (start < 0 || len < 0 || start > s_len - len) {
3150 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3151 } else {
3152 if (len > 0) {
3153 bool is_latin1 = java_lang_String::is_latin1(s);
3154 if (!is_latin1) {
3155 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3156 buf, len);
3157 } else {
3158 for (int i = 0; i < len; i++) {
3159 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3160 }
3161 }
3162 }
3163 }
3164 JNI_END
3165
3166 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3167 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3168
3169 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3170 JNIWrapper("GetStringUTFRegion");
3171 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3172 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3173 oop s = JNIHandles::resolve_non_null(string);
3174 typeArrayOop s_value = java_lang_String::value(s);
3175 int s_len = java_lang_String::length(s, s_value);
3176 if (start < 0 || len < 0 || start > s_len - len) {
3177 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3178 } else {
3179 //%note jni_7
3180 if (len > 0) {
3181 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3182 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3183 // as_utf8_string null-terminates the result string
3184 } else {
3185 // JDK null-terminates the buffer even in len is zero
3186 if (buf != NULL) {
3187 buf[0] = 0;
3188 }
3189 }
3190 }
3191 JNI_END
3192
3193 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3194 if (Universe::heap()->supports_object_pinning()) {
3195 const oop o = JNIHandles::resolve_non_null(obj);
3196 return Universe::heap()->pin_object(thread, o);
3197 } else {
3198 GCLocker::lock_critical(thread);
3199 return JNIHandles::resolve_non_null(obj);
3200 }
3201 }
3202
3203 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3204 if (Universe::heap()->supports_object_pinning()) {
3205 const oop o = JNIHandles::resolve_non_null(obj);
3206 return Universe::heap()->unpin_object(thread, o);
3207 } else {
3208 GCLocker::unlock_critical(thread);
3209 }
3210 }
3211
3212 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3213 JNIWrapper("GetPrimitiveArrayCritical");
3214 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3215 if (isCopy != NULL) {
3216 *isCopy = JNI_FALSE;
3217 }
3218 oop a = lock_gc_or_pin_object(thread, array);
3219 assert(a->is_array(), "just checking");
3220 BasicType type;
3221 if (a->is_objArray()) {
3222 type = T_OBJECT;
3223 } else {
3224 type = TypeArrayKlass::cast(a->klass())->element_type();
3225 }
3226 void* ret = arrayOop(a)->base(type);
3227 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3228 return ret;
3229 JNI_END
3230
3231
3232 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3233 JNIWrapper("ReleasePrimitiveArrayCritical");
3234 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3235 unlock_gc_or_unpin_object(thread, array);
3236 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3237 JNI_END
3238
3239
3240 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3241 JNIWrapper("GetStringCritical");
3242 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3243 oop s = lock_gc_or_pin_object(thread, string);
3244 typeArrayOop s_value = java_lang_String::value(s);
3245 bool is_latin1 = java_lang_String::is_latin1(s);
3246 if (isCopy != NULL) {
3247 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3248 }
3249 jchar* ret;
3250 if (!is_latin1) {
3251 ret = (jchar*) s_value->base(T_CHAR);
3252 } else {
3253 // Inflate latin1 encoded string to UTF16
3254 int s_len = java_lang_String::length(s, s_value);
3255 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3256 /* JNI Specification states return NULL on OOM */
3257 if (ret != NULL) {
3258 for (int i = 0; i < s_len; i++) {
3259 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3260 }
3261 ret[s_len] = 0;
3262 }
3263 }
3264 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3265 return ret;
3266 JNI_END
3267
3268
3269 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3270 JNIWrapper("ReleaseStringCritical");
3271 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3272 // The str and chars arguments are ignored for UTF16 strings
3273 oop s = JNIHandles::resolve_non_null(str);
3274 bool is_latin1 = java_lang_String::is_latin1(s);
3275 if (is_latin1) {
3276 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3277 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3278 FREE_C_HEAP_ARRAY(jchar, chars);
3279 }
3280 unlock_gc_or_unpin_object(thread, str);
3281 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3282 JNI_END
3283
3284
3285 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3286 JNIWrapper("jni_NewWeakGlobalRef");
3287 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3288 Handle ref_handle(thread, JNIHandles::resolve(ref));
3289 jweak ret = JNIHandles::make_weak_global(ref_handle);
3290 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3291 return ret;
3292 JNI_END
3293
3294 // Must be JNI_ENTRY (with HandleMark)
3295 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3296 JNIWrapper("jni_DeleteWeakGlobalRef");
3297 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3298 JNIHandles::destroy_weak_global(ref);
3299 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3300 JNI_END
3301
3302
3303 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
3304 JNIWrapper("jni_ExceptionCheck");
3305 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3306 jni_check_async_exceptions(thread);
3307 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3308 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3309 return ret;
3310 JNI_END
3311
3312
3313 // Initialization state for three routines below relating to
3314 // java.nio.DirectBuffers
3315 static int directBufferSupportInitializeStarted = 0;
3316 static volatile int directBufferSupportInitializeEnded = 0;
3317 static volatile int directBufferSupportInitializeFailed = 0;
3318 static jclass bufferClass = NULL;
3319 static jclass directBufferClass = NULL;
3320 static jclass directByteBufferClass = NULL;
3321 static jmethodID directByteBufferConstructor = NULL;
3322 static jfieldID directBufferAddressField = NULL;
3323 static jfieldID bufferCapacityField = NULL;
3324
3325 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3326 Handle loader; // null (bootstrap) loader
3327 Handle protection_domain; // null protection domain
3328
3329 TempNewSymbol sym = SymbolTable::new_symbol(name);
3330 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3331
3332 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3333 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3334 }
3335 return result;
3336 }
3337
3338 // These lookups are done with the NULL (bootstrap) ClassLoader to
3339 // circumvent any security checks that would be done by jni_FindClass.
3340 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3341 {
3342 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3343 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3344 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3345 return true;
3346 }
3347 JNI_END
3348
3349
3350 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3351 if (directBufferSupportInitializeFailed) {
3352 return false;
3353 }
3354
3355 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3356 if (!lookupDirectBufferClasses(env)) {
3357 directBufferSupportInitializeFailed = 1;
3358 return false;
3359 }
3360
3361 // Make global references for these
3362 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3363 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3364 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3365
3366 // Get needed field and method IDs
3367 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3368 if (env->ExceptionCheck()) {
3369 env->ExceptionClear();
3370 directBufferSupportInitializeFailed = 1;
3371 return false;
3372 }
3373 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3374 if (env->ExceptionCheck()) {
3375 env->ExceptionClear();
3376 directBufferSupportInitializeFailed = 1;
3377 return false;
3378 }
3379 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3380 if (env->ExceptionCheck()) {
3381 env->ExceptionClear();
3382 directBufferSupportInitializeFailed = 1;
3383 return false;
3384 }
3385
3386 if ((directByteBufferConstructor == NULL) ||
3387 (directBufferAddressField == NULL) ||
3388 (bufferCapacityField == NULL)) {
3389 directBufferSupportInitializeFailed = 1;
3390 return false;
3391 }
3392
3393 directBufferSupportInitializeEnded = 1;
3394 } else {
3395 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3396 os::naked_yield();
3397 }
3398 }
3399
3400 return !directBufferSupportInitializeFailed;
3401 }
3402
3403 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3404 {
3405 // thread_from_jni_environment() will block if VM is gone.
3406 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3407
3408 JNIWrapper("jni_NewDirectByteBuffer");
3409 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3410
3411 if (!directBufferSupportInitializeEnded) {
3412 if (!initializeDirectBufferSupport(env, thread)) {
3413 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3414 return NULL;
3415 }
3416 }
3417
3418 // Being paranoid about accidental sign extension on address
3419 jlong addr = (jlong) ((uintptr_t) address);
3420 // NOTE that package-private DirectByteBuffer constructor currently
3421 // takes int capacity
3422 jint cap = (jint) capacity;
3423 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3424 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3425 return ret;
3426 }
3427
3428 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3429 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3430
3431 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3432 {
3433 // thread_from_jni_environment() will block if VM is gone.
3434 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3435
3436 JNIWrapper("jni_GetDirectBufferAddress");
3437 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3438 void* ret = NULL;
3439 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3440
3441 if (!directBufferSupportInitializeEnded) {
3442 if (!initializeDirectBufferSupport(env, thread)) {
3443 return 0;
3444 }
3445 }
3446
3447 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3448 return 0;
3449 }
3450
3451 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3452 return ret;
3453 }
3454
3455 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3456 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3457
3458 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3459 {
3460 // thread_from_jni_environment() will block if VM is gone.
3461 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3462
3463 JNIWrapper("jni_GetDirectBufferCapacity");
3464 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3465 jlong ret = -1;
3466 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3467
3468 if (!directBufferSupportInitializeEnded) {
3469 if (!initializeDirectBufferSupport(env, thread)) {
3470 ret = 0;
3471 return ret;
3472 }
3473 }
3474
3475 if (buf == NULL) {
3476 return -1;
3477 }
3478
3479 if (!env->IsInstanceOf(buf, directBufferClass)) {
3480 return -1;
3481 }
3482
3483 // NOTE that capacity is currently an int in the implementation
3484 ret = env->GetIntField(buf, bufferCapacityField);
3485 return ret;
3486 }
3487
3488
3489 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3490 JNIWrapper("GetVersion");
3491 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3492 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3493 return CurrentVersion;
3494 JNI_END
3495
3496 extern struct JavaVM_ main_vm;
3497
3498 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3499 JNIWrapper("jni_GetJavaVM");
3500 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3501 *vm = (JavaVM *)(&main_vm);
3502 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3503 return JNI_OK;
3504 JNI_END
3505
3506
3507 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3508 JNIWrapper("GetModule");
3509 return Modules::get_module(clazz, THREAD);
3510 JNI_END
3511
3512
3513 // Structure containing all jni functions
3514 struct JNINativeInterface_ jni_NativeInterface = {
3515 NULL,
3516 NULL,
3517 NULL,
3518
3519 NULL,
3520
3521 jni_GetVersion,
3522
3523 jni_DefineClass,
3524 jni_FindClass,
3525
3526 jni_FromReflectedMethod,
3527 jni_FromReflectedField,
3528
3529 jni_ToReflectedMethod,
3530
3531 jni_GetSuperclass,
3532 jni_IsAssignableFrom,
3533
3534 jni_ToReflectedField,
3535
3536 jni_Throw,
3537 jni_ThrowNew,
3538 jni_ExceptionOccurred,
3539 jni_ExceptionDescribe,
3540 jni_ExceptionClear,
3541 jni_FatalError,
3542
3543 jni_PushLocalFrame,
3544 jni_PopLocalFrame,
3545
3546 jni_NewGlobalRef,
3547 jni_DeleteGlobalRef,
3548 jni_DeleteLocalRef,
3549 jni_IsSameObject,
3550
3551 jni_NewLocalRef,
3552 jni_EnsureLocalCapacity,
3553
3554 jni_AllocObject,
3555 jni_NewObject,
3556 jni_NewObjectV,
3557 jni_NewObjectA,
3558
3559 jni_GetObjectClass,
3560 jni_IsInstanceOf,
3561
3562 jni_GetMethodID,
3563
3564 jni_CallObjectMethod,
3565 jni_CallObjectMethodV,
3566 jni_CallObjectMethodA,
3567 jni_CallBooleanMethod,
3568 jni_CallBooleanMethodV,
3569 jni_CallBooleanMethodA,
3570 jni_CallByteMethod,
3571 jni_CallByteMethodV,
3572 jni_CallByteMethodA,
3573 jni_CallCharMethod,
3574 jni_CallCharMethodV,
3575 jni_CallCharMethodA,
3576 jni_CallShortMethod,
3577 jni_CallShortMethodV,
3578 jni_CallShortMethodA,
3579 jni_CallIntMethod,
3580 jni_CallIntMethodV,
3581 jni_CallIntMethodA,
3582 jni_CallLongMethod,
3583 jni_CallLongMethodV,
3584 jni_CallLongMethodA,
3585 jni_CallFloatMethod,
3586 jni_CallFloatMethodV,
3587 jni_CallFloatMethodA,
3588 jni_CallDoubleMethod,
3589 jni_CallDoubleMethodV,
3590 jni_CallDoubleMethodA,
3591 jni_CallVoidMethod,
3592 jni_CallVoidMethodV,
3593 jni_CallVoidMethodA,
3594
3595 jni_CallNonvirtualObjectMethod,
3596 jni_CallNonvirtualObjectMethodV,
3597 jni_CallNonvirtualObjectMethodA,
3598 jni_CallNonvirtualBooleanMethod,
3599 jni_CallNonvirtualBooleanMethodV,
3600 jni_CallNonvirtualBooleanMethodA,
3601 jni_CallNonvirtualByteMethod,
3602 jni_CallNonvirtualByteMethodV,
3603 jni_CallNonvirtualByteMethodA,
3604 jni_CallNonvirtualCharMethod,
3605 jni_CallNonvirtualCharMethodV,
3606 jni_CallNonvirtualCharMethodA,
3607 jni_CallNonvirtualShortMethod,
3608 jni_CallNonvirtualShortMethodV,
3609 jni_CallNonvirtualShortMethodA,
3610 jni_CallNonvirtualIntMethod,
3611 jni_CallNonvirtualIntMethodV,
3612 jni_CallNonvirtualIntMethodA,
3613 jni_CallNonvirtualLongMethod,
3614 jni_CallNonvirtualLongMethodV,
3615 jni_CallNonvirtualLongMethodA,
3616 jni_CallNonvirtualFloatMethod,
3617 jni_CallNonvirtualFloatMethodV,
3618 jni_CallNonvirtualFloatMethodA,
3619 jni_CallNonvirtualDoubleMethod,
3620 jni_CallNonvirtualDoubleMethodV,
3621 jni_CallNonvirtualDoubleMethodA,
3622 jni_CallNonvirtualVoidMethod,
3623 jni_CallNonvirtualVoidMethodV,
3624 jni_CallNonvirtualVoidMethodA,
3625
3626 jni_GetFieldID,
3627
3628 jni_GetObjectField,
3629 jni_GetBooleanField,
3630 jni_GetByteField,
3631 jni_GetCharField,
3632 jni_GetShortField,
3633 jni_GetIntField,
3634 jni_GetLongField,
3635 jni_GetFloatField,
3636 jni_GetDoubleField,
3637
3638 jni_SetObjectField,
3639 jni_SetBooleanField,
3640 jni_SetByteField,
3641 jni_SetCharField,
3642 jni_SetShortField,
3643 jni_SetIntField,
3644 jni_SetLongField,
3645 jni_SetFloatField,
3646 jni_SetDoubleField,
3647
3648 jni_GetStaticMethodID,
3649
3650 jni_CallStaticObjectMethod,
3651 jni_CallStaticObjectMethodV,
3652 jni_CallStaticObjectMethodA,
3653 jni_CallStaticBooleanMethod,
3654 jni_CallStaticBooleanMethodV,
3655 jni_CallStaticBooleanMethodA,
3656 jni_CallStaticByteMethod,
3657 jni_CallStaticByteMethodV,
3658 jni_CallStaticByteMethodA,
3659 jni_CallStaticCharMethod,
3660 jni_CallStaticCharMethodV,
3661 jni_CallStaticCharMethodA,
3662 jni_CallStaticShortMethod,
3663 jni_CallStaticShortMethodV,
3664 jni_CallStaticShortMethodA,
3665 jni_CallStaticIntMethod,
3666 jni_CallStaticIntMethodV,
3667 jni_CallStaticIntMethodA,
3668 jni_CallStaticLongMethod,
3669 jni_CallStaticLongMethodV,
3670 jni_CallStaticLongMethodA,
3671 jni_CallStaticFloatMethod,
3672 jni_CallStaticFloatMethodV,
3673 jni_CallStaticFloatMethodA,
3674 jni_CallStaticDoubleMethod,
3675 jni_CallStaticDoubleMethodV,
3676 jni_CallStaticDoubleMethodA,
3677 jni_CallStaticVoidMethod,
3678 jni_CallStaticVoidMethodV,
3679 jni_CallStaticVoidMethodA,
3680
3681 jni_GetStaticFieldID,
3682
3683 jni_GetStaticObjectField,
3684 jni_GetStaticBooleanField,
3685 jni_GetStaticByteField,
3686 jni_GetStaticCharField,
3687 jni_GetStaticShortField,
3688 jni_GetStaticIntField,
3689 jni_GetStaticLongField,
3690 jni_GetStaticFloatField,
3691 jni_GetStaticDoubleField,
3692
3693 jni_SetStaticObjectField,
3694 jni_SetStaticBooleanField,
3695 jni_SetStaticByteField,
3696 jni_SetStaticCharField,
3697 jni_SetStaticShortField,
3698 jni_SetStaticIntField,
3699 jni_SetStaticLongField,
3700 jni_SetStaticFloatField,
3701 jni_SetStaticDoubleField,
3702
3703 jni_NewString,
3704 jni_GetStringLength,
3705 jni_GetStringChars,
3706 jni_ReleaseStringChars,
3707
3708 jni_NewStringUTF,
3709 jni_GetStringUTFLength,
3710 jni_GetStringUTFChars,
3711 jni_ReleaseStringUTFChars,
3712
3713 jni_GetArrayLength,
3714
3715 jni_NewObjectArray,
3716 jni_GetObjectArrayElement,
3717 jni_SetObjectArrayElement,
3718
3719 jni_NewBooleanArray,
3720 jni_NewByteArray,
3721 jni_NewCharArray,
3722 jni_NewShortArray,
3723 jni_NewIntArray,
3724 jni_NewLongArray,
3725 jni_NewFloatArray,
3726 jni_NewDoubleArray,
3727
3728 jni_GetBooleanArrayElements,
3729 jni_GetByteArrayElements,
3730 jni_GetCharArrayElements,
3731 jni_GetShortArrayElements,
3732 jni_GetIntArrayElements,
3733 jni_GetLongArrayElements,
3734 jni_GetFloatArrayElements,
3735 jni_GetDoubleArrayElements,
3736
3737 jni_ReleaseBooleanArrayElements,
3738 jni_ReleaseByteArrayElements,
3739 jni_ReleaseCharArrayElements,
3740 jni_ReleaseShortArrayElements,
3741 jni_ReleaseIntArrayElements,
3742 jni_ReleaseLongArrayElements,
3743 jni_ReleaseFloatArrayElements,
3744 jni_ReleaseDoubleArrayElements,
3745
3746 jni_GetBooleanArrayRegion,
3747 jni_GetByteArrayRegion,
3748 jni_GetCharArrayRegion,
3749 jni_GetShortArrayRegion,
3750 jni_GetIntArrayRegion,
3751 jni_GetLongArrayRegion,
3752 jni_GetFloatArrayRegion,
3753 jni_GetDoubleArrayRegion,
3754
3755 jni_SetBooleanArrayRegion,
3756 jni_SetByteArrayRegion,
3757 jni_SetCharArrayRegion,
3758 jni_SetShortArrayRegion,
3759 jni_SetIntArrayRegion,
3760 jni_SetLongArrayRegion,
3761 jni_SetFloatArrayRegion,
3762 jni_SetDoubleArrayRegion,
3763
3764 jni_RegisterNatives,
3765 jni_UnregisterNatives,
3766
3767 jni_MonitorEnter,
3768 jni_MonitorExit,
3769
3770 jni_GetJavaVM,
3771
3772 jni_GetStringRegion,
3773 jni_GetStringUTFRegion,
3774
3775 jni_GetPrimitiveArrayCritical,
3776 jni_ReleasePrimitiveArrayCritical,
3777
3778 jni_GetStringCritical,
3779 jni_ReleaseStringCritical,
3780
3781 jni_NewWeakGlobalRef,
3782 jni_DeleteWeakGlobalRef,
3783
3784 jni_ExceptionCheck,
3785
3786 jni_NewDirectByteBuffer,
3787 jni_GetDirectBufferAddress,
3788 jni_GetDirectBufferCapacity,
3789
3790 // New 1_6 features
3791
3792 jni_GetObjectRefType,
3793
3794 // Module features
3795
3796 jni_GetModule
3797 };
3798
3799
3800 // For jvmti use to modify jni function table.
3801 // Java threads in native contiues to run until it is transitioned
3802 // to VM at safepoint. Before the transition or before it is blocked
3803 // for safepoint it may access jni function table. VM could crash if
3804 // any java thread access the jni function table in the middle of memcpy.
3805 // To avoid this each function pointers are copied automically.
3806 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3807 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3808 intptr_t *a = (intptr_t *) jni_functions();
3809 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3810 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3811 Atomic::store(*b++, a++);
3812 }
3813 }
3814
3815 void quicken_jni_functions() {
3816 // Replace Get<Primitive>Field with fast versions
3817 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3818 address func;
3819 func = JNI_FastGetField::generate_fast_get_boolean_field();
3820 if (func != (address)-1) {
3821 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3822 }
3823 func = JNI_FastGetField::generate_fast_get_byte_field();
3824 if (func != (address)-1) {
3825 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3826 }
3827 func = JNI_FastGetField::generate_fast_get_char_field();
3828 if (func != (address)-1) {
3829 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3830 }
3831 func = JNI_FastGetField::generate_fast_get_short_field();
3832 if (func != (address)-1) {
3833 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3834 }
3835 func = JNI_FastGetField::generate_fast_get_int_field();
3836 if (func != (address)-1) {
3837 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3838 }
3839 func = JNI_FastGetField::generate_fast_get_long_field();
3840 if (func != (address)-1) {
3841 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3842 }
3843 func = JNI_FastGetField::generate_fast_get_float_field();
3844 if (func != (address)-1) {
3845 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3846 }
3847 func = JNI_FastGetField::generate_fast_get_double_field();
3848 if (func != (address)-1) {
3849 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3850 }
3851 }
3852 }
3853
3854 // Returns the function structure
3855 struct JNINativeInterface_* jni_functions() {
3856 #if INCLUDE_JNI_CHECK
3857 if (CheckJNICalls) return jni_functions_check();
3858 #endif // INCLUDE_JNI_CHECK
3859 return &jni_NativeInterface;
3860 }
3861
3862 // Returns the function structure
3863 struct JNINativeInterface_* jni_functions_nocheck() {
3864 return &jni_NativeInterface;
3865 }
3866
3867 static void post_thread_start_event(const JavaThread* jt) {
3868 assert(jt != NULL, "invariant");
3869 EventThreadStart event;
3870 if (event.should_commit()) {
3871 event.set_thread(JFR_THREAD_ID(jt));
3872 event.commit();
3873 }
3874 }
3875
3876 // Invocation API
3877
3878
3879 // Forward declaration
3880 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3881
3882 // Global invocation API vars
3883 volatile int vm_created = 0;
3884 // Indicate whether it is safe to recreate VM
3885 volatile int safe_to_recreate_vm = 1;
3886 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3887
3888
3889 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3890 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3891
3892 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3893 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3894
3895 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3896 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3897 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3898 jint ret = JNI_ERR;
3899 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3900
3901 if (Threads::is_supported_jni_version(args->version)) {
3902 ret = JNI_OK;
3903 }
3904 // 1.1 style no longer supported in hotspot.
3905 // According the JNI spec, we should update args->version on return.
3906 // We also use the structure to communicate with launcher about default
3907 // stack size.
3908 if (args->version == JNI_VERSION_1_1) {
3909 args->version = JNI_VERSION_1_2;
3910 // javaStackSize is int in arguments structure
3911 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3912 args->javaStackSize = (jint)(ThreadStackSize * K);
3913 }
3914 return ret;
3915 }
3916
3917 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3918 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3919
3920 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3921 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3922
3923 jint result = JNI_ERR;
3924 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3925
3926 // We're about to use Atomic::xchg for synchronization. Some Zero
3927 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3928 // but __sync_lock_test_and_set is not guaranteed to do what we want
3929 // on all architectures. So we check it works before relying on it.
3930 #if defined(ZERO) && defined(ASSERT)
3931 {
3932 jint a = 0xcafebabe;
3933 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3934 void *c = &a;
3935 void *d = Atomic::xchg(&b, &c);
3936 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3937 assert(c == &b && d == &a, "Atomic::xchg() works");
3938 }
3939 #endif // ZERO && ASSERT
3940
3941 // At the moment it's only possible to have one Java VM,
3942 // since some of the runtime state is in global variables.
3943
3944 // We cannot use our mutex locks here, since they only work on
3945 // Threads. We do an atomic compare and exchange to ensure only
3946 // one thread can call this method at a time
3947
3948 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3949 // the add/dec implementations are dependent on whether we are running
3950 // on a multiprocessor Atomic::xchg does not have this problem.
3951 if (Atomic::xchg(1, &vm_created) == 1) {
3952 return JNI_EEXIST; // already created, or create attempt in progress
3953 }
3954 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3955 return JNI_ERR; // someone tried and failed and retry not allowed.
3956 }
3957
3958 assert(vm_created == 1, "vm_created is true during the creation");
3959
3960 /**
3961 * Certain errors during initialization are recoverable and do not
3962 * prevent this method from being called again at a later time
3963 * (perhaps with different arguments). However, at a certain
3964 * point during initialization if an error occurs we cannot allow
3965 * this function to be called again (or it will crash). In those
3966 * situations, the 'canTryAgain' flag is set to false, which atomically
3967 * sets safe_to_recreate_vm to 1, such that any new call to
3968 * JNI_CreateJavaVM will immediately fail using the above logic.
3969 */
3970 bool can_try_again = true;
3971
3972 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3973 if (result == JNI_OK) {
3974 JavaThread *thread = JavaThread::current();
3975 assert(!thread->has_pending_exception(), "should have returned not OK");
3976 /* thread is thread_in_vm here */
3977 *vm = (JavaVM *)(&main_vm);
3978 *(JNIEnv**)penv = thread->jni_environment();
3979
3980 #if INCLUDE_JVMCI
3981 if (EnableJVMCI) {
3982 if (UseJVMCICompiler) {
3983 // JVMCI is initialized on a CompilerThread
3984 if (BootstrapJVMCI) {
3985 JavaThread* THREAD = thread;
3986 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3987 compiler->bootstrap(THREAD);
3988 if (HAS_PENDING_EXCEPTION) {
3989 HandleMark hm;
3990 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3991 }
3992 }
3993 }
3994 }
3995 #endif
3996
3997 // Notify JVMTI
3998 if (JvmtiExport::should_post_thread_life()) {
3999 JvmtiExport::post_thread_start(thread);
4000 }
4001
4002 post_thread_start_event(thread);
4003
4004 #ifndef PRODUCT
4005 if (ReplayCompiles) ciReplay::replay(thread);
4006
4007 // Some platforms (like Win*) need a wrapper around these test
4008 // functions in order to properly handle error conditions.
4009 VMError::test_error_handler();
4010 #endif
4011
4012 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4013 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4014 } else {
4015 // If create_vm exits because of a pending exception, exit with that
4016 // exception. In the future when we figure out how to reclaim memory,
4017 // we may be able to exit with JNI_ERR and allow the calling application
4018 // to continue.
4019 if (Universe::is_fully_initialized()) {
4020 // otherwise no pending exception possible - VM will already have aborted
4021 JavaThread* THREAD = JavaThread::current();
4022 if (HAS_PENDING_EXCEPTION) {
4023 HandleMark hm;
4024 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4025 }
4026 }
4027
4028 if (can_try_again) {
4029 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4030 safe_to_recreate_vm = 1;
4031 }
4032
4033 // Creation failed. We must reset vm_created
4034 *vm = 0;
4035 *(JNIEnv**)penv = 0;
4036 // reset vm_created last to avoid race condition. Use OrderAccess to
4037 // control both compiler and architectural-based reordering.
4038 OrderAccess::release_store(&vm_created, 0);
4039 }
4040
4041 // Flush stdout and stderr before exit.
4042 fflush(stdout);
4043 fflush(stderr);
4044
4045 return result;
4046
4047 }
4048
4049 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4050 jint result = JNI_ERR;
4051 // On Windows, let CreateJavaVM run with SEH protection
4052 #ifdef _WIN32
4053 __try {
4054 #endif
4055 result = JNI_CreateJavaVM_inner(vm, penv, args);
4056 #ifdef _WIN32
4057 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4058 // Nothing to do.
4059 }
4060 #endif
4061 return result;
4062 }
4063
4064 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4065 // See bug 4367188, the wrapper can sometimes cause VM crashes
4066 // JNIWrapper("GetCreatedJavaVMs");
4067
4068 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4069
4070 if (vm_created == 1) {
4071 if (numVMs != NULL) *numVMs = 1;
4072 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4073 } else {
4074 if (numVMs != NULL) *numVMs = 0;
4075 }
4076 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4077 return JNI_OK;
4078 }
4079
4080 extern "C" {
4081
4082 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4083 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4084
4085 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4086 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4087 jint res = JNI_ERR;
4088 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4089
4090 if (vm_created == 0) {
4091 res = JNI_ERR;
4092 return res;
4093 }
4094
4095 JNIWrapper("DestroyJavaVM");
4096 JNIEnv *env;
4097 JavaVMAttachArgs destroyargs;
4098 destroyargs.version = CurrentVersion;
4099 destroyargs.name = (char *)"DestroyJavaVM";
4100 destroyargs.group = NULL;
4101 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4102 if (res != JNI_OK) {
4103 return res;
4104 }
4105
4106 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4107 JavaThread* thread = JavaThread::current();
4108 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4109 if (Threads::destroy_vm()) {
4110 // Should not change thread state, VM is gone
4111 vm_created = 0;
4112 res = JNI_OK;
4113 return res;
4114 } else {
4115 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4116 res = JNI_ERR;
4117 return res;
4118 }
4119 }
4120
4121 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4122 jint result = JNI_ERR;
4123 // On Windows, we need SEH protection
4124 #ifdef _WIN32
4125 __try {
4126 #endif
4127 result = jni_DestroyJavaVM_inner(vm);
4128 #ifdef _WIN32
4129 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4130 // Nothing to do.
4131 }
4132 #endif
4133 return result;
4134 }
4135
4136 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4137 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4138
4139 // Check below commented out from JDK1.2fcs as well
4140 /*
4141 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4142 return JNI_EVERSION;
4143 }
4144 */
4145
4146 Thread* t = Thread::current_or_null();
4147 if (t != NULL) {
4148 // If the thread has been attached this operation is a no-op
4149 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4150 return JNI_OK;
4151 }
4152
4153 // Create a thread and mark it as attaching so it will be skipped by the
4154 // ThreadsListEnumerator - see CR 6404306
4155 JavaThread* thread = new JavaThread(true);
4156
4157 // Set correct safepoint info. The thread is going to call into Java when
4158 // initializing the Java level thread object. Hence, the correct state must
4159 // be set in order for the Safepoint code to deal with it correctly.
4160 thread->set_thread_state(_thread_in_vm);
4161 thread->record_stack_base_and_size();
4162 thread->register_thread_stack_with_NMT();
4163 thread->initialize_thread_current();
4164
4165 if (!os::create_attached_thread(thread)) {
4166 thread->smr_delete();
4167 return JNI_ERR;
4168 }
4169 // Enable stack overflow checks
4170 thread->create_stack_guard_pages();
4171
4172 thread->initialize_tlab();
4173
4174 thread->cache_global_variables();
4175
4176 // This thread will not do a safepoint check, since it has
4177 // not been added to the Thread list yet.
4178 { MutexLocker ml(Threads_lock);
4179 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4180 // avoid this thread trying to do a GC before it is added to the thread-list
4181 thread->set_active_handles(JNIHandleBlock::allocate_block());
4182 Threads::add(thread, daemon);
4183 }
4184 // Create thread group and name info from attach arguments
4185 oop group = NULL;
4186 char* thread_name = NULL;
4187 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4188 group = JNIHandles::resolve(args->group);
4189 thread_name = args->name; // may be NULL
4190 }
4191 if (group == NULL) group = Universe::main_thread_group();
4192
4193 // Create Java level thread object and attach it to this thread
4194 bool attach_failed = false;
4195 {
4196 EXCEPTION_MARK;
4197 HandleMark hm(THREAD);
4198 Handle thread_group(THREAD, group);
4199 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4200 if (HAS_PENDING_EXCEPTION) {
4201 CLEAR_PENDING_EXCEPTION;
4202 // cleanup outside the handle mark.
4203 attach_failed = true;
4204 }
4205 }
4206
4207 if (attach_failed) {
4208 // Added missing cleanup
4209 thread->cleanup_failed_attach_current_thread(daemon);
4210 return JNI_ERR;
4211 }
4212
4213 // mark the thread as no longer attaching
4214 // this uses a fence to push the change through so we don't have
4215 // to regrab the threads_lock
4216 thread->set_done_attaching_via_jni();
4217
4218 // Set java thread status.
4219 java_lang_Thread::set_thread_status(thread->threadObj(),
4220 java_lang_Thread::RUNNABLE);
4221
4222 // Notify the debugger
4223 if (JvmtiExport::should_post_thread_life()) {
4224 JvmtiExport::post_thread_start(thread);
4225 }
4226
4227 post_thread_start_event(thread);
4228
4229 *(JNIEnv**)penv = thread->jni_environment();
4230
4231 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4232 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4233 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4234 // needed.
4235
4236 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4237
4238 // Perform any platform dependent FPU setup
4239 os::setup_fpu();
4240
4241 return JNI_OK;
4242 }
4243
4244
4245 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4246 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4247 if (vm_created == 0) {
4248 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4249 return JNI_ERR;
4250 }
4251
4252 JNIWrapper("AttachCurrentThread");
4253 jint ret = attach_current_thread(vm, penv, _args, false);
4254 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4255 return ret;
4256 }
4257
4258
4259 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4260 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4261
4262 JNIWrapper("DetachCurrentThread");
4263
4264 // If the thread has already been detached the operation is a no-op
4265 if (Thread::current_or_null() == NULL) {
4266 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4267 return JNI_OK;
4268 }
4269
4270 VM_Exit::block_if_vm_exited();
4271
4272 JavaThread* thread = JavaThread::current();
4273 if (thread->has_last_Java_frame()) {
4274 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4275 // Can't detach a thread that's running java, that can't work.
4276 return JNI_ERR;
4277 }
4278
4279 // Safepoint support. Have to do call-back to safepoint code, if in the
4280 // middle of a safepoint operation
4281 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4282
4283 // XXX: Note that JavaThread::exit() call below removes the guards on the
4284 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4285 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4286 // of the guards is visible in jni_AttachCurrentThread above,
4287 // the removal of the guards is buried below in JavaThread::exit()
4288 // here. The abstraction should be more symmetrically either exposed
4289 // or hidden (e.g. it could probably be hidden in the same
4290 // (platform-dependent) methods where we do alternate stack
4291 // maintenance work?)
4292 thread->exit(false, JavaThread::jni_detach);
4293 thread->smr_delete();
4294
4295 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4296 return JNI_OK;
4297 }
4298
4299 DT_RETURN_MARK_DECL(GetEnv, jint
4300 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4301
4302 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4303 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4304 jint ret = JNI_ERR;
4305 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4306
4307 if (vm_created == 0) {
4308 *penv = NULL;
4309 ret = JNI_EDETACHED;
4310 return ret;
4311 }
4312
4313 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4314 return ret;
4315 }
4316
4317 #ifndef JVMPI_VERSION_1
4318 // need these in order to be polite about older agents
4319 #define JVMPI_VERSION_1 ((jint)0x10000001)
4320 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4321 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4322 #endif // !JVMPI_VERSION_1
4323
4324 Thread* thread = Thread::current_or_null();
4325 if (thread != NULL && thread->is_Java_thread()) {
4326 if (Threads::is_supported_jni_version_including_1_1(version)) {
4327 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4328 ret = JNI_OK;
4329 return ret;
4330
4331 } else if (version == JVMPI_VERSION_1 ||
4332 version == JVMPI_VERSION_1_1 ||
4333 version == JVMPI_VERSION_1_2) {
4334 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4335 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4336 ret = JNI_EVERSION;
4337 return ret;
4338 } else if (JvmtiExport::is_jvmdi_version(version)) {
4339 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4340 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4341 ret = JNI_EVERSION;
4342 return ret;
4343 } else {
4344 *penv = NULL;
4345 ret = JNI_EVERSION;
4346 return ret;
4347 }
4348 } else {
4349 *penv = NULL;
4350 ret = JNI_EDETACHED;
4351 return ret;
4352 }
4353 }
4354
4355
4356 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4357 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4358 if (vm_created == 0) {
4359 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4360 return JNI_ERR;
4361 }
4362
4363 JNIWrapper("AttachCurrentThreadAsDaemon");
4364 jint ret = attach_current_thread(vm, penv, _args, true);
4365 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4366 return ret;
4367 }
4368
4369
4370 } // End extern "C"
4371
4372 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4373 NULL,
4374 NULL,
4375 NULL,
4376
4377 jni_DestroyJavaVM,
4378 jni_AttachCurrentThread,
4379 jni_DetachCurrentThread,
4380 jni_GetEnv,
4381 jni_AttachCurrentThreadAsDaemon
4382 };